20 numbers UTUL Biology
1. The eukaryotic cell organelle that functions to store metabolic products, water, and maintain cell turgidity is .... A. plastids B. lysosomes C. peroxisomes D. vacuoles E. vesicles
2. The correct statement regarding compounds produced by endocrine glands is .... A. Secreted directly into blood vessels and acting elsewhere B. Distributed by the nervous system C. Found only in vertebrates D. Secreted into special sacs for transport E. Insoluble in fat
3. The compound that is a reaction product in the thylakoid and a material for reactions in the stroma in photosynthesis is .... A. \mathrm{CO}_{2}CO 2and \mathrm{H}_{2} \mathrm{O}H 2O B. NADP^{+} + and ADP C. ATP and NADPH _{2} 2D. Glucose and \mathrm{O}_{2}O 2E. \mathrm{CO}_{2}CO 2and ATP
4. The correct pairing of substrate, enzyme, and product is .... A. Starch, amylase, fructose B. Protein, peptidase, nucleoside C. Starch, peptidase, glucose D. Nucleic acid, endonuclease, nucleotide E. Protein, endonuclease, amino acid
5. The following are post-translational modification processes in proteins, except .... A. Loss of signal sequence B. Proteolytic degradation C. Formation of sulfide bonds D. Addition of carbohydrate side chains E. Addition of amino acids to the polypeptide chain
6. A plant exhibits a red flower phenotype. The following statement is correct for determining the genotype of the plant in question: A. The plant is homozygous if crossing with a white-flowered plant produces \mathrm{F}_{2}F 2white flowers B. The plant is heterozygous if crossing with a white-flowered plant produces \mathrm{F}_{2}F 2red flowers C. The plant is homozygous if crossing with a red-flowered plant produces \mathrm{F}_{2}F 2red flowers D. The plant is heterozygous if crossing with a white-flowered plant produces \mathrm{F}_{2}F 2white flowers E. The plant is homozygous if crossing with a red-flowered plant produces \mathrm{F}_{2}F 2white flowers
7. The following is a correct characteristic of a plasmid: A. Composed only of RNA B. Constitutes the core DNA of a virus C. Composed of RNA and protein D. Constitutes a segment of DNA in the bacterial chromosome E. Can be transferred between bacteria during conjugation
8. Fish with scales have a thicker layer of mucus than fish without scales. BECAUSE The mucus on the surface of fish's bodies functions for osmoregulation and preventing infection. The answer is D
9. Protists use mitochondria in respiration. BECAUSE Protists are eukaryotic organisms that are aerobic. The answer is A
10. The presence of choanocytes is an important characteristic of animals classified as sponges. BECAUSE Chonganocytes are cells lining the spongocoel and play a role in food digestion. The answer is B
11. The presence of carpels distinguishes between gymnosperms and angiosperms. BECAUSE The development of ovules into seeds in gymnosperms occurs on the outside of the carpels. The answer is C
12. During interphase, cells remain active. BECAUSE During interphase, cells carry out metabolism for their survival. The answer is A
13. The introduction of exotic species is a major factor in the decline of biodiversity. BECAUSE Exotic species have a wide tolerance for environmental parameters. The answer is A
14. In an energy pyramid, the highest trophic level has the lowest stored energy. BECAUSE In an energy pyramid, the highest trophic level has the lowest number of individuals. The answer is C
15. The following is true about viruses: (1) Their genetic material is RNA and DNA (2) They require a host to reproduce (3) They have haploid chromosomes (4) They have a capsule made of protein and lipids The answer is E
16. The following statement is true for gymnosperms and angiosperms: They both have ... (1) Xylem (2) Sporophyte (3) Phloem (4) True fruit The answer is A
17. Energy transformation occurs in mitochondria, so this organelle is found in many cells ... (1) Muscle (2) Blood (3) Nerves (4) Eggs The answer is B
18. The following characteristics of bees are... (1) Triploblastic (2) Hemimetabolous (3) Parthenogenesis (4) Piercing and sucking mouthparts The answer is B
19. The following statement related to natural selection proposed by Charles Darwin is... (1) Genetic variation occurs among individuals within a population (2) The reproductive ability of a species leads to population increase (3) Organisms will compete for natural resources (1) (4) Individuals that are able to adapt well to their habitat will pass on superior traits to the next generation The answer is A
20. The bacterium Argobacterium tumefaciens, which infects plants, can insert some of its DNA into the chromosomes of plant cells and cause tumor formation. This is caused by the presence in the Argobacterium plasmid of genes that code for the synthesis of the hormone... (1) auxin (2) gibberellin (3) cytokinin (4) abscisic acid The answer is B
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