Download BIOD 121 FINAL EXAM 2025-2026 100+ QUESTIONS AND VERIFIED ANSWERS ALREADY GRADED A+ and more Exams Biology in PDF only on Docsity!
BIOD 121 FINAL EXAM 202 5 - 2026 100+ QUESTIONS AND
VERIFIED ANSWERS ALREADY GRADED A+.
Which statement is NOT true about polar covalent bonds? A. When covalent bonds are nonpolar, the electrons are shared fairly equally between the atoms. B. Electrons are shared unequally in a polar covalent bond. C. The larger atom in a polar bond attracts the electron more strongly than the smaller atom D. Polar covalent bonds are important in the characteristics of water. E. The oxygen of a water molecule is electropositive relative to the hydrogen - CORRECT ANSWER>>E The expected outcome of an experiment is known as A. a scientific theory or principle. B. experimental results. C. a prediction. D. a scientific model.an experiment. - CORRECT ANSWER>>D A triglyceride is a polymer made up of which kind of subunits? A. amino acids B. nucleotides C. glucose or modified glucose molecules D. alternating sugar and phosphate groups E. fatty acids and glycerol - CORRECT ANSWER>>E You are interested in the effect of increased carbon dioxide versus normal air on the growth of corn plants as well as the effect of green light versus full sunlight on the growth of corn plants. Your plan is to set up your experiment inside a greenhouse where
you can control the environment. Which of the following is an aspect of the experiment that should be considered and controlled? A. An increase in carbon dioxide should not result in a substantial decrease of other necessary gases. B. All seedlings come from one uniform strain. C. The intensity or brightness of the green light equals the intensity of the full sunlight. D. All temperatures and available water remain the same for all plants. E. All of the choices are important considerations. - CORRECT ANSWER>>E Which listing correctly indicates a sequence of increasing biological organization? A. molecule, cell, organelle, atom B. atom, molecule, organelle, cell C. organ, tissue, atom, molecule D. organelle, tissue, cell, molecule - CORRECT ANSWER>>B Which statement is true about RNA? A. One of the bases from DNA is replaced by uracil. B. It is a double-stranded molecule. C. It contains adenine paired to thymine. D. It contains the sugar deoxyribose. E. Its nucleotides contain twice as many phosphate groups as DNA's nucleotides. - CORRECT ANSWER>>A A carbon atom can form up to three single covalent bonds with other atoms. True or False - CORRECT ANSWER>>False How many atoms are required to form a molecule? A. at least two B. only one
B. the oxygen atom has an overall negative charge with the hydrogen atoms having an overall positive charge. C. unequal sharing of electrons results in a polar molecule. D. All of the choices are correct. - CORRECT ANSWER>>D All living organisms are made up of cells. True or False - CORRECT ANSWER>>True Living things must have an outside source of nutrients and energy. True or False - CORRECT ANSWER>>True Only multicellular organisms need to maintain homeostasis. True or False - CORRECT ANSWER>>False The ultimate source of energy for nearly all forms of life on Earth is water. True or False - CORRECT ANSWER>>False If you place the corner of a paper towel into a droplet of water, the water moves into the paper towel. Which of the following would explain the movement of the water? A. Both cohesion and adhesion. B. surface tension C. cohesion D. adhesion - CORRECT ANSWER>>A A saturated fat A. is often solid at room temperature. B. has fatty acids with no double bonds between the carbon atoms. C. is of animal origin. D. All of the choices are correct. - CORRECT ANSWER>>D The alpha helix and beta sheet are found at which level of protein organization? A. quaternary structure B. primary structure
C. secondary structure D. tertiary structure - CORRECT ANSWER>>C If an element contains eight electrons how many electrons will be placed in the second valence shell? A. 2 B. 11 C. 5 D. 8 E. 6 - CORRECT ANSWER>>E Label the following diagram with the appropriate terms to describe one type of chemical bonding. Then, respond to the question posed by correctly labeling the type of bonding depicted. - CORRECT ANSWER>>Na;Cl;Na+;Cl-;ionic bond Organic molecules are those that contain at least A. carbon. B. carbon, oxygen, and hydrogen. C. carbon and oxygen. D. carbon and hydrogen. - CORRECT ANSWER>>D A valence shell is best described as A. the electron shell closest to the nucleus. B. the original energy level of electrons in photosynthesis. C. the volume of space in which electrons are most often found. D. the outermost electron shell of an atom. - CORRECT ANSWER>>D Which is NOT true about the electrical charges of elements? A. An atom is neutral when the positive and negative charges balance. B. Neutrons have no electrical charge.
C. globular. D. alpha helix. - CORRECT ANSWER>>B Identify the following molecule: A. amino acid B. carbohydrate C. cholesterol D. alcohol E. hydrocarbon - CORRECT ANSWER>>C A polysaccharide is a polymer made up of which kind of monomers? A. amino acids B. nucleotides C. alternating sugar and phosphate groups D. simple sugars E. fatty acids and glycerol - CORRECT ANSWER>>D Which of the following is a function of a steroid? A. insulation against cold B. transmission of genetic information C. sex hormone D. protective layer E. long term energy storage - CORRECT ANSWER>>C Due to human activities, more carbon dioxide is being released into the atmosphere than is being removed. What happens to this extra carbon dioxide? Select all that apply. A. Some of the carbon dioxide stays in the atmosphere which causes surface temperature to rise.
B. Approximately half of the extraneous carbon dioxide is being expelled into deep space. C. Much of the extraneous carbon dioxide is dissolved into the oceans where it is causing acidification. D. Trees and other plants have increased their rates of photosynthesis and are effectively removing most of the extraneous carbon dioxide. - CORRECT ANSWER>>A, B, C, D Saturated fatty acids and unsaturated fatty acids differ in A. the number of carbon-to-carbon bonds. B. the consistency at room temperature. C. the number of hydrogen atoms present. D. All of the choices are differences between saturated and unsaturated fatty acids. - CORRECT ANSWER>>D In the scientific method, what precedes the formation of the hypothesis? A. analysis of results B. observation C. a prediction D. experimentation - CORRECT ANSWER>>B ATP is a nucleotide that functions in providing energy for cellular work. True or False - CORRECT ANSWER>>True What are the basic structures that make up a nucleotide? A. pentose sugar, phosphate, and nitrogen-containing base B. pentose sugar, phosphate, and sulfur-containing base C. pentose sugar, nitrate, and phosphorus-containing base D. pentose sugar, sodium, and nitrogen-containing base
D. descriptive research E. a scientific theory or principle - CORRECT ANSWER>>E Your professor shows you a computer model of a protein and asks you to identify the highest structural level. It appears to consist of only one polypeptide chain and has a globular shape. What is your determination? A. The protein has secondary structure. B. This is not a picture of a protein. C. The protein has tertiary structure. D. The protein has quaternary structure. E. The protein has primary structure. - CORRECT ANSWER>>C Which statement below correctly describes why ATP is a high energy structure? A. ATP has three phosphate bonds that are very stable and difficult to break. B. ATP is composed of thymine which is a high energy molecule. C. ATP has three phosphate bonds, two of which are unstable and easily broken. D. ATP contains two phosphate bonds that contain high levels of energy. E. ATP contains hydro-carbon chains that hold energy. - CORRECT ANSWER>>D Which term refers to the attraction of water molecules to one another? A. hydrolysis B. cohesion C. photolysis D. adhesion E. polarity - CORRECT ANSWER>>B Identify this molecule: A. amino acid B. carbohydrate C. alcohol
D. hydrocarbon E. lipid - CORRECT ANSWER>>B As a solid, water floats. This means that A. solid water is less dense than liquid water. B. organisms in ponds, lakes, and reservoirs can survive under the ice cover. C. the hydrogen bond arrangement differs between ice and liquid water. D. All of the choices are correct. - CORRECT ANSWER>>D Which carbohydrate is used to store energy in the liver? A. glycerol B. glycogen C. chitin D. starch E. cellulose - CORRECT ANSWER>>B Climate change is primarily due to an imbalance in the chemical cycling of the element carbon. True or False - CORRECT ANSWER>>True What are the four biomolecules, monomers, and polymers? - CORRECT ANSWER>>Carbohydrates-Monosaccharide-Polysaccharide Lipids-Glycerol and fatty acids-N/A Proteins-Amino acids-Polypeptide Nucleic acids-Nucleotide-DNA, RNA A hydrocarbon is hydrophobic A. only in the living cell environment. B. at all times. C. in carbohydrates but not in lipids.
E. OH - CORRECT ANSWER>>C
The control group in an experiment receives all the same treatments as the experimental group(s), except for the one variable being tested. True or False - CORRECT ANSWER>>True Which of the following is the primary function of carbohydrates in living organisms? A. Carbohydrates are used mainly for insulation and protection. B. Carbohydrates store hereditary information. C. Carbohydrates are used as an immediate energy source. D. Carbohydrates form the basic structural framework of all cell membranes. - CORRECT ANSWER>>C What term is used for molecules that have identical molecular formulas but the atoms in each molecule are arranged differently? A. organic B. homomolecules C. isotope D. isomer E. balanced - CORRECT ANSWER>>D Label each of the functional groups on the following biomolecules. A. sulfhydryl group B. carboxyl group C. hydroxyl group D. amino group E. carbonyl group - CORRECT ANSWER>>Label biomolecules You come across an image of a molecule in research article about fatty acids. You notice the molecule has several double bonds in its structure. Based on your knowledge of fatty acids, you conclude that this molecule is most likely
A. something other than a fatty acid because fatty acids don't have double bonds. B. a saturated fatty acid. C. an unsaturated fatty acid. - CORRECT ANSWER>>C The mass number refers to the number of _____ and _____ within an element. A. electrons; neutrons B. electrons; atoms C. protons; electrons D. protons; molecules E. protons; neutrons - CORRECT ANSWER>>E All of the following are examples of damage caused by acid deposition from rain EXCEPT A. leaching of aluminum from the soil into lakes which results in the formation of toxic methyl mercury from mercury in the lake sediments. B. damage to marble and limestone monuments. C. weakens trees in the forests and kills seedlings. D. increased agricultural yields. - CORRECT ANSWER>>D Which of the following gives rise to both lysosomes and secretory vesicles? A. ribosomes B. mitochondria C. centrioles D. rough endoplasmic reticulum E. Golgi apparatus - CORRECT ANSWER>>E All of the following are true statements about eukaryotic cells except: A. Eukaryotic cells contain many organelles in the cytoplasm. B. Eukaryotic cells contain peptidoglycan in their cell walls.
B. matrix C. stroma D. cristae - CORRECT ANSWER>>C Sugars and amino acids are carried into the cell by means of A. diffusion B. exocytosis C. desmosomes D. osmosis E. facilitated transport - CORRECT ANSWER>>E Which of the following is not likely to pass through the plasma membrane by simple diffusion? A. carbon dioxide B. small, uncharged molecules C. water D. charged ions such as Na+ E. oxygen - CORRECT ANSWER>>D Which channel protein assists the passage of water across the cell membrane? A. integrin. B. aquaporin. C. ATP synthase. D. the sodium-potassium pump. - CORRECT ANSWER>>B Which of the following is NOT associated with animal cells? A. adhesion junctions (desmosomes) B. tight junctions C. an extracellular matrix
D. plasmodesmata E. gap junctions - CORRECT ANSWER>>D Which cell junction will allow the movement of molecules between two plant cells? A. gap B. tight C. adhesion D. plasmodesmata - CORRECT ANSWER>>D A multicellular organism, such as a rabbit, is A. composed of a single cell. B. composed of a variety of different cell types. C. composed of one giant cell. D. composed of many cells that are all the same type. - CORRECT ANSWER>>B Which of the following protein functions is not correctly associated with the correct integral protein? A. carrier proteins—facilitate passage of molecules through the membrane B. receptor proteins--enable passage of molecules through membrane via a conformational change C. channel proteins—facilitate receptor-mediated endocytosis D. cell recognition proteins—recognition of self versus non-self E. enzymatic proteins—catalyze a specific chemical reaction - CORRECT ANSWER>>C Which of the following organelles is NOT part of the endomembrane system? A. Golgi complex B. lysosomes C. endoplasmic reticulum D. mitochondria - CORRECT ANSWER>>D
Which of the following is an example of active transport through a cell membrane? A. movement of carbon dioxide out of the bloodstream and into the lungs B. movement of oxygen from the lungs into the bloodstream C. The movement of chlorine ions from an area of low concentration on one side of the membrane to an area of high concentration on the other side of the membrane. D. movement of H+ ions across a plasma membrane from an area of high concentration to an area of low concentration via a channel protein - CORRECT ANSWER>>C Single- celled paramecia, as well as the cells that line our respiratory tract, have these short hairlike projections: A. cilia B. microfilaments C. pili D. flagella E. centrioles - CORRECT ANSWER>>A Active transport A. requires an input of ATP. B. is involved in diffusion. C. occurs in osmosis. D. All of the choices are correct. - CORRECT ANSWER>>A Which of the following organelles is found in autotrophic eukaryotic cells but not heterotrophic eukaryotic cells? A. lysosomes B. ribosomes C. chloroplast D. mitochondria
E. rough endoplasmic reticulum - CORRECT ANSWER>>C In a phospholipid bilayer, the A. phosphate heads are oriented toward the exterior of the cell or toward the cytoplasm. B. phosphate groups are hydrophobic. C. proteins are located only between the two layers. D. fatty acid tails are oriented toward the exterior of the cell or toward the cytoplasm. E. fatty acid tails are hydrophilic. - CORRECT ANSWER>>A Which process is responsible for moving cellular wastes across the cell membrane and out of the cell? A. endocytosis B. exocytosis C. receptor-mediated endocytosis D. pinocytosis - CORRECT ANSWER>>B All cells have these two characteristics: A. contain DNA in the nucleus and have a plasma membrane B. contain mitochondria and chloroplasts C. have a plasma membrane and ribosomes in the cytoplasm D. produce a cell wall outside of the plasma membrane - CORRECT ANSWER>>C Which type of junctions will create a solid barrier to prevent molecules from moving between the cells? A. Plasmodesmata are narrow channels B. gap C. desmosomes
