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Incorrect answer. Please choose another answer. A cell uses which of the following to accelerate chemical reactions enabling its metabolic machinery to operate? Centrasome c. Golgi apparatus d. Enzymes Enzymes are catalysts, chemicals that speed up...
Found: 25 May 2021 | Rating: 95/100
[GET] Biology 2 Midterm Exam Answers
Photosynthesis is the metabolic pathway that produces oxygen and glucose in organisms with chlorophyll. Respiration breaks down molecules called ATP for cells to use as energy. Digestion breaks down food to be used to make energy in the form of ATP....
Found: 25 May 2021 | Rating: 95/100
Assessment Of Learning Gains Associated With Independent Exam Analysis In Introductory Biology
Genes are found on chromosomes. Double c. Quadruple d. The DNA molecule looks like a twisted ladder and is referred to as a double helix. Each nucleotide contains a sugar molecule and a phosphate group, along with a nitrogen base. Genes are located within the cytoplasm of the cell. Hydrochloric acid c. Ribonucleic acid d. In the ribosome, the information coded onto messenger RNA is used to make proteins. When sexual reproduction occurs in multicellular organisms, a process takes place before cells fuse whereby a cell is left with half of its chromosomes, enabling the creation of a cell with a characteristic chromosome number. What is this process called? Osmosis c. Anabolism d. Differentiation During meiosis, gametes sex cells are formed by reducing the number of chromosomes found in somatic body cells by one half.
Found: 13 Apr 2021 | Rating: 86/100
This occurs so that when two gametes, one from each parent, fuse together, the embryo will contain the correct number of chromosomes. Without meiosis, offspring cells would contain double the number of chromosomes of normal adults and they would not be viable. Which of the following represents the largest group of biological classification? Kingdom c. Class d. Genus Biology uses a system of classification to group organisms together based on their characteristics. The levels of classification, from largest most inclusive to smallest most specific , include domain, kingdom, phylum, class, order, family, genus, species. There are two types of cells, eukaryotic and prokaryotic. Which of the following cellular structures are found in both types of cell? Prokaryotic cells are found in bacteria and their structure is much more simple than eukaryotic cells.
Found: 1 Apr 2021 | Rating: 88/100
Assessment Of Learning Gains Associated With Independent Exam Analysis In Introductory Biology
Prokaryotic cells have a few simple cellular structures such as a nucleoid region, ribosomes, and a plasma membrane. Eukaryotic cells have more highly developed cellular structures including organelles that support the function of the cell. Golgi apparatus and mitochondria are found in eukaryotic cells. Chloroplasts are found in eukaryotic cells that contain chlorophyll, such as plants.
Found: 20 Apr 2021 | Rating: 91/100
What it is the name given to specialized structures within cells responsible for carrying out specific functions such as providing energy and producing hormones? Mitiosis c. Archaeans d. Organelles Organelles are specialized structures in cells that support the cellular functions. For example, mitochondria are organelles that synthesize energy; ribosomes synthesize protein; chloroplasts convert sunlight, carbon dioxide and water into oxygen and sugar. Internal complexity c. Size d. Ecological relationships Unicellular organisms are very small compared to most multicellular organisms.
Found: 2 Apr 2021 | Rating: 86/100
Prescribed Active Learning Increases Performance In Introductory Biology
If they were as large as a multicellular organism, their surface area to volume ratio would be too low to support life. Staying small gives unicellular organisms a high surface area to volume ratio. Larger cells have less surface area compared to their volume. Molecules move into the cell, out of the cell and through the cell slowly through the cell membrane. Having a large surface area provides more space for molecules to diffuse across the cell membrane and less of a distance to travel inside the cell to supply organelles with materials needed for metabolism.
Found: 3 Apr 2021 | Rating: 93/100
Geometry Midterm Exam Answers 2021
Strategies that worked well in those classes may not work well here. The following are study strategies that are geared toward students in biology classes. You probably won't have time to try all of these strategies, but pick a few that you think may help and try those. The key is to find as many different ways to work with the information that you are given. Before Class It's very important that you read the text before class; but HOW you read the book makes all the difference.
Found: 17 Apr 2021 | Rating: 86/100
12th Standard - 1st Mid Term Exam - Question Papers With Answer Keys
If you don't have time to read the whole chapter, at least look at the pictures and read the captions. Biology is a visual subject and many of the concepts are best explained as a picture. Don't try to memorize the whole chapter. Many instructors will not use ALL the information in the text, and will add information that is not in the text. The instructor will let you know which parts of the chapter are most relevant. Make a list of all the words in the chapter that you don't understand. It is very likely that these are terms that the teacher will explain in class. If you already have these words written down — you will have a head start on note taking in class. Also, you are more likely to understand the lecture if you have an idea about what terms will be important even if you don't know what they mean If a picture is used multiple times in the same chapter - it's probably important.
Found: 22 Apr 2021 | Rating: 88/100
If you have the pictures from the book or photocopies you will be able to take notes much more quickly. If you do take notes in your book or somewhere else — make sure to include that in your notes. Write something like "see fig 3. Don't try to write down everything the instructor says. This is one of the more difficult aspects of being a student — knowing what's important in a lecture. It takes practice. Some hints for taking notes: If the instructor writes it on the board — put it in your notes. If the instructor says "this is important" or something similar — put it in your notes. If the instructor refers to something in the book — write down the page or figure number so you can go back to it later. Develop a system for taking notes. There are official methods for taking notes — or you can develop your own. If there are sets of words that are used a lot in class — make up a symbol for them that you will remember.
Found: 18 Apr 2021 | Rating: 89/100
General Biology Practice Exams
You may want to make a list of these symbols in case you forget. You can try working on your note-taking system by watching a TV show or movie and taking notes. If you miss something during lecture: Ask the instructor to repeat the information. Leave a space and move on — come back and fill in what you missed later. Don't miss the next point because you were asking your neighbor about the last point. If something is unclear in class — ASK!
Found: 5 Apr 2021 | Rating: 90/100
Most instructors won't mind you asking for clarification in class. It's often embarrassing to be the one asking the questions — but your fellow students will be glad you did. They probably have the same question, and were just too shy to ask. Asking questions does not make you seem like a dumb student — it makes you seem like an interested student. If you have the time, you may want to record the lectures. This way, if you miss something, you can always go back to it. You can also listen to the whole lecture again. Some students listen to these on their way to work — it makes time spent in traffic more productive.
Found: 14 Apr 2021 | Rating: 87/100
Or, you can listen to them as you clean the house, or go jogging. The key to this strategy is repetition — it may not stick the first time, but it will stick eventually. In a Lab Class Read the lab for that day and make sure you fully understand what you are doing in class. In most lab classes, you will be expected to be self-sufficient in completing the assignments, so you do need to understand what is expected of you that day. As an added bonus, if you are organized and have a plan — you may even finish early. On the other hand, if you spend your lab time figuring out what you are supposed to do, you may not finish the lab. Divide and conquer. You may not have time to do all parts of the experiment on your own. Part of the skills that a laboratory class is meant to teach is how to work together. However, make sure you understand all parts of the experiment, even if you didn't actually conduct it yourself. After Class Rewrite your notes. This is time-consuming but does two things.
Found: 25 Apr 2021 | Rating: 85/100
Google Certified Educator Level 1 Exam Answers 2021
It gives you a chance to review what you covered in class and make sure you didn't miss anything. It also gives you a well-organized set of notes to study for the test. This strategy works best if the notes are redone shortly after class. Use the resources that are provided! The Biology department has worked hard to be able to provide a study room LS for its students.
Found: 6 Apr 2021 | Rating: 92/100
12th 1st Mid Term Exam Question Paper And Answer Key 2021-2021
Please make use of it. There may be models, practice tests, or computer resources that are available to you in that room. There are also tutors that can help answer questions. Find online resources that cover the same information. Try typing the topic and the word "tutorial" or "quiz" into a search engine. I recommend using google. Google also has an image library that you can search for pictures of bacteria, muscles, flowers, or whatever you are looking for.
Found: 11 Apr 2021 | Rating: 85/100
19 Parasitology Quizzes Online, Trivia, Questions & Answers - ProProfs Quizzes
If you have any questions, ask your instructor during office hours. Studying for the test Write your own test. If you had 20 or 50, or questions that you could ask about this information — what would you ask? What topics are the most important? How would you ask questions about each of these topics? Knowing what will be on a test is a difficult skill — but, with practice, you should be able to figure it out. Find a study group. This technique doesn't work for everyone, but it can be very effective. Talk through the subject matter and make sure everyone understands it, or quiz each other.
Found: 17 Apr 2021 | Rating: 86/100
Acellus Answer Key Midterm - 1medicoguia.com
This is a great resource to make sure that you aren't misunderstanding the concepts. Strategies for memory-based tests The strategies below are particularly useful for classes or topics that have a lot of vocabulary or names. Flashcards, an old favorite. Some students even cut the cards in half so they don't write too much on them. Some tips for how to make good flashcards: One side of the card should have one vocabulary word on it and the other side should have a definition or picture Alternatively, you could write one question on the front side, and the answer on the back.
Found: 10 Apr 2021 | Rating: 87/100
Some tips for using flashcards: Make sure to study the flashcards in both directions looking at the word and saying the definition, and looking at the definition and saying the word. Keep them with you. Study them as you wait in line or as the microwave is going. The key here is — a little studying more often is better than a lot of studying for a short time. Make piles with your flashcards. A pile for the information you know and a pile for the information you forgot. Then take the second pile and go through it again — and again, put the cards into two piles. This way you spend more time studying the cards that you are having a difficult time with. Photocopy pictures from the book and remove the labels. Make about five copies of each picture.
Found: 3 Apr 2021 | Rating: 91/100
Free Biology Flashcards About Biology Midterm Exam
Hang these pictures all over your house your family will have to deal with it! As you walk by each picture, label one thing on the picture.
Found: 5 Apr 2021 | Rating: 89/100
Biology Midterm Exam Prep Part 2 Worksheet
The process by which particles move from a region of high concentration to a region of low concentration is known as diffusion. Diffusion occurs until the regions have an even concentration of the liquid or gas particles. Procedure a Hold the glass tubing vertically in a beaker so that one end of the tubing rests on the bottom of the beaker. Expected observations After some time, the purple colour of the potassium manganate VII spread throughout the water and eventually all the water turned purple. The potassium manganate VII particles break away from the crystals, dissolve in water and then diffuse through the water until they are evenly distributed. The Role of Diffusion in Living Organisms a In Plants Diffusion plays an important role in plants in that: It helps in absorption of mineral salts from the soil to the plant.
Found: 11 Apr 2021 | Rating: 92/100
Most salts dissolve in soil water. For those salts whose concentration in soil water is higher that their concentration in the cell sap of root hair cells, they move into the root hair cells through diffusion. Plants require mineral salts for numerous life processes. Diffusion plays a role in gaseous exchange in plants. The respiratory gases oxygen and carbon IV oxide diffuse across the stomata and lenticels of plants. Diffusion also contributes to the transportation of manufactured food materials from the leaves to other parts of the plant. End products of digestion such as amino acids and glucose diffuse across the wall of the ileum into the blood for transport to other parts of the animal body. Diffusion also plays a significant role in gaseous exchange in animals. In animals, gaseous exchange occurs at certain structures known as respiratory surfaces. These include the skin, gills, lungs, tracheal system and the cell membrane in unicellular organisms.
Found: 15 Apr 2021 | Rating: 88/100
Biology Exam Questions And Answers
Gaseous exchange at these surfaces occurs through the process of diffusion. Diffusion is important in excretion of nitrogenous wastes especially in unicellular animals. Factors affecting the rate of Diffusion a Diffusion gradient A greater diffusion gradient between two points increases the rate of diffusion. Increasing the concentration of diffusing molecules also increases diffusion gradient with corresponding regions hence increases the rate of diffusion. The greater the surface area to volume ratio, the greater the rate of diffusion will be. Conversely, low surface area to volume ratio results in a low diffusion rate. This implies that diffusion rate is greater in small organisms than the large organisms.
Found: 19 Apr 2021 | Rating: 85/100
This is because the small organisms have a large surface area to volume ratio. As a result, most of their body parts are closer to the external surrounding leading to faster diffusion. Small organisms can, therefore, depend on diffusion alone as a means of transporting foods, respiratory gases and waste products. To large organisms, diffusion alone is inadequate as a means of transport of foods and excretion.
Found: 26 Apr 2021 | Rating: 93/100
They have an additional transport system. Organisms always lose heat to the surrounding through diffusion. This implies that small animals lose a lot of heat to the surrounding compared to the large animals. This is because the distance covered by the diffusing molecules is greater through the thicker membranes. The rate of diffusion is higher in thinner membranes. Osmosis Osmosis is a process by which solvent molecules move from a region of high concentration dilute solution to a region of low concentration concentrated solution through a semi permeable membrane. Osmosis can be described as a special type of diffusion since it involves movement of solvent Water particles from a region of high concentration to a region of low concentration. Demonstration of Osmosis Using a Visking Tubing Requirements 5OOcm3 beaker, visking tubing, a piece of thread, glass rod, concentrated sugar solution, cm3 distilled Water.
Found: 28 Apr 2021 | Rating: 93/100
Procedure 1. Into the beaker, put cm3 of the distilled water. Dip the visking tubing in water to moisten it. Open the visking tubing and tie one end with the thread provided. Half fill the visking tubing with the sugar solution provided and then tie the open end of the tubing. Ensure no sugar solution spills out of the tubing. Immerse the visking tubing into the distilled water in the beaker and suspend it using the glass rod provided. Leave the set up for about 30 minutes. Record your observations. Explain the observations made. Observations The visking tubing became swollen indicating that its cell contents increased. The amount of water in the beaker decreased. This implies that water moved from the beaker into the visking tubing. Explanation The visking tubing contains both sugar and water molecules.
Found: 23 Apr 2021 | Rating: 85/100
Biology Midterm Practice Test: Quiz
The beaker contains a higher concentration of water molecules than the visking tubing. The water molecules diffused from the beaker where they are highly concentrated into the visking tubing where they are lowly concentrated. Even though there is a higher concentration of sugar molecules in the visking tubing, they were not able to diffuse out of the visking tubing due to their large molecular sizes. The visking tubing is semi permeable. Other than visking tubing, dialysis tubing or cellophane are also other semi permeable membranes that can be used in this experiment. Osmosis explained When two separate solutions are separated by a semi permeable membrane, there will be movement of water molecules from their region of high concentration dilute solution to a region of low concentration the highly concentrated solution across the semi permeable membrane. The semi permeable membrane does not allow movement of solute particles across it.
Found: 3 Apr 2021 | Rating: 88/100
FORM 2 ALL SUBJECTS EXAMS, ASSIGNMENTS: FREE TERM 1-3 EXAMS & ANSWERS
The movement of the water molecules continues until the separate solutions have the same concentrations. Solutions with the same concentrations are referred to as isotonic solutions. The solutions are said to be isotonic to each other. A lowly concentrated solution dilute solution is referred to as a hypotonic solution. A hypotonic solution has less of the solute molecules but more of the solvent molecules. A highly concentrated solution with more of the solute particles but less of the solvent particles is referred to as a hypertonic solution. When isotonic solutions are separated with a semi permeable membrane, there will be no net movement of solvent molecules to any of the solutions since they have the same concentration of solvent molecules.
Found: 10 Apr 2021 | Rating: 87/100
MIDTERM EXAM ON 21ST CENTURY LIT.
Osmotic pressure When a concentrated solution is separated from distilled water by a semi permeable membrane, the concentrated solution will develop a force with which it draws water through the semi permeable membrane from the distilled water. Osmotic pressure refers to the force with which a concentrated solution draws water to itself. An osmometer is an instrument used to measure the osmotic pressure. Osmotic potential This is a measure of the pressure a solution would develop to withdraw water molecules from pure water when separated by a semi permeable membrane.
Found: 26 Apr 2021 | Rating: 92/100
Artificial Intelligence Midterm Exam
Water Relations in Animals As discussed earlier, the cell membrane is semi permeable. Let us discuss what would happen if an animal cell say red blood cell is placed in solutions of varying concentrations a Red blood cell in hypotonic solution e. When a red blood cell is placed in a hypotonic solution, water will move into the cell through osmosis. The cell will swell and burst. Swelling of red blood cell when placed in a hypotonic solution is referred to as haemolysis. The cell is said to be haemolysed. Water will, therefore, be drawn out of the cell into the hypertonic solution. The cell will shrink and become small. The cell is said to be crenated.
Found: 19 Apr 2021 | Rating: 89/100
The process by which animal cells shrink and become smaller when placed in hypertonic solutions is referred to as crenation. Note: When the cell becomes haemolysed or crenated, its functioning is impaired. This will prevent bursting or shrinking of the cells that would otherwise impair their physiology. The body has a mechanism through which these concentrations are maintained at a nearly same concentration. Water Relations in Plants Water relations in plant cells differ with that in animal cells. A plant cell has both a cellulose cell wall and cell membrane. The centre of the cell contains vacuole with sap. The sap is a solution of salts and sugars and is bound by a membrane, the tonoplast. The cell membrane and tonoplast are semi permeable while the cellulose cell wall is fully permeable.
Found: 11 Apr 2021 | Rating: 92/100
Biology Key For Quizzes And Exams, Fall
The cellulose cell wall is rigid and does not allow plant cells to burst as in the case of animal cells. As the cell gains more water, the vacuole enlarges and exerts an outward an outward pressure on the cell wall called turgor pressure. The turgor pressure increases as more water is taken into the vacuole causing the cell to stretch until the cell cannot stretch any more. The cell becomes firm and is said to be turgid. Turgor pressure is the outward pressure that the cell cytoplasm exerts on the cell wall as it gains more water through osmosis. When the cell wall is being stretched towards the outside, it will develop a resistant pressure to stretching that is equal and opposite to turgor pressure called wall pressure.
Found: 2 Apr 2021 | Rating: 91/100
Exams BMB Molecular Biology And Genetics - Biochemistry And Molecular Biology
It the cell loses more water, its contents reduce in size and the plasma membrane pulls away from the cell wall towards the centre. Wilting Plants always lose water to the atmosphere through transpiration and evaporation. Simultaneously, the plant cells lose water and draw more from the soil. Wilting is a phenomenon that occurs when plant cells lose more water than they draw from the soil making the plant cells to lose their turgor pressure and droop.
Found: 27 Apr 2021 | Rating: 91/100
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