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Biology Test 2
| Question | Answer |
|---|---|
| In mitosis, if a parent cell has 16 chromosomes, each daughter cell will have how many chromosomes? a. 64 b. 32 c. 16 d. 8 e. 4 | c. 16 |
| In eukaryotic cells, which can occur during mitosis? a. the duplication of chromatids b. the replication of DNA c. pairing of homologous chromosomes d. fragmentation and disappearance of nuclear envelope and nucleolus e. all of these | d. fragmentation and disappearance of nuclear envelope and nucleolus |
| In which of the stages below does the chromosome consist of two DNA molecules? I. metaphase II. telophase III. Prophase IV. anaphase a. III and IV b. I, III, and IV c. I and III d. I, II, and III e. I, II, III, and IV | c. I and III |
| Four of the five answers listed below are periods of the same cycle. Select the exception. a. G1 b. M c. R d. S e. G2 | c. R |
| Asexually produced daughter cells are a. identical to each other. b. identical to mother cell. c. different from mother cell. d. different from each other. e. identical to each other and identical to the mother cell. | e. identical to each other and identical to the mother cell. |
| Copies of chromosomes linked together at their centromeres at the beginning of meiosis are appropriately called what kind of chromatids? a. mother b. daughter c. sister d. homologous e. none of these | c. sister |
| The mature ovum is produced by maturation of the a. oogonium. b. primary oocyte. c. secondary polar body. d. polar body I. e. none of these | e. none of these |
| Three of the four answers listed below concern cells with two chromosome sets. Select the exception. a. zygote b. somatic cells c. gamete d. diploid | c. gamete |
| Which scientist(s) identified the transforming substance involved in changing R bacteria to S? a. Avery b. Griffith c. Chargaff d. Hershey and Chase e. Pauling | a. Avery |
| From X-ray diffraction data which of the following was determined about DNA a.The molecule had uniform diameter b.The molecule was long and narrow c.Part of the molecule repeated itself often d.The shape of the molecule could be spiral e.all of these | e. all of these |
| DNA polymerase a.is an enzyme. b.adds new nucleotides to a strand. c.proofreads DNA strands to see that they are correct. d.derives energy from ATP for synthesis of DNA strands. e.all of these | e. all of these |
| 12. In terms of their nitrogenous base component, how many different kinds of RNA molecules are there? a. 3 b. 4 c. 5 d. 6 e. 12 | b. 4 |
| There are how many different kinds of RNA codons? a. 3 b. 12 c. 28 d. 64 e. 120 | d. 64 |
| Amino acids are joined together in proteins by a. hydrogen bonds. b. peptide bonds. c. anticodons. d. wobble effects. e. codon bonds. | b. peptide bonds. |
| Four of the five answers listed below are related pairings. Select the exception. a. double-stranded DNA–messenger RNA b. purine–pyrimidine c. codon–anticodon d. small subunit–large subunit e. promoter–terminator | e. promoter–terminator |
| Four of the five answers listed below are related by a common number. Select the exceptio a.number of nucleotides in a codon b.number of building blocks (parts) in a nucleotide c.number of stop codons d.number of types of DNA e.number of types of RNA | d.number of types of DNA |
| In his experiments with plants, Mendel removed which part of the plant to prevent unwanted fertilizations? a. flowers b. petals c. pistils d. stamens e. stigmas | d. stamens |
| Which organism did Mendel use to work out the laws of segregation and independent assortment? a. the fruit fly b. Neurospora c. the garden pea d. the chicken e. E. coli | c. the garden pea |
| Hybrid organisms produced from a cross between two pure-breeding organisms belong to which generation? a. P1 b. H1 c. A1 d. F1 e. F2 | d. F1 |
| The F2 phenotypic ratio of a monohybrid cross is a. 1:1. b. 2:1. c. 9:3:3:1. d. 1:2:1. e. 3:1. | e. 3:1 |
| The results of a testcross reveal that all offspring resemble the parent being tested. That parent necessarily is a. heterozygous. b. polygenic. c. homozygous. d. recessive. | c. homozygous. |
| For monohybrid experiments, a testcross could result in which of the following ratios? a. 1:1 b. 2:1 c. 9:3:3:1 d. 1:2:1 e. 3:1 | a. 1:1 |
| In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant over spotted (s).If two dihybrids were crossed, what fraction of the black solid offspring would be homozygous? a.4/16 b.9/16 c.1/9 d.3/16 e.3/4 | c. 1/9 |
| A population a.is the unit of evolution b.consists of interbreeding members of the same species c.shares the same gene pool d.grows at an exponential rate when the birth rate exceeds the death rate at a constant differential e.all of these | e. all of these |
| Population size depends upon a. deaths. b. births. c. migration. d. immigration. e. all of these | e. all of these |
| A J-shaped growth curve is converted to an S-shaped one a.when parents are past reproductive age b.if the data are plotted in reverse c.when the carrying capacity is reached d.if reproduction stop e.only for fast-growing populations such as bacteria | c.when the carrying capacity is reached |
| What term denotes the range of all factors that influence whether a species can obtain resources essential for survival and reproduction? a. habitat b. niche c. carrying capacity d. ecosystem e. community | b. niche |
| In mixed assemblages, baboons sometimes see predators that impala do not hear. In both cases, the flight of one species alerts the other to danger. This is an example of a.a neutral relationship. b.commensalism. c.mutualism. d.competition. | c. mutualism. |
| A male wolf who is courting a female bares his teeth when a second male approaches the same female. The second male retreats. Example of: a.a neutral interaction. b.exploitation competition. c.intraspecific competition. d.competitive exclusion. | c. intraspecific competition. |
| A community differs from an ecosystem in that the former does NOT include a.unicellular organisms. b.decomposers. c.abiotic (nonliving) factors. d.unicellular organisms and decomposers. e.unicelluar organisms and abiotic (nonliving) factors. | c.abiotic (nonliving) factors. |
| Of the energy that enters one trophic level, approximately what percent (average) becomes available for the next trophic level? a. 100 b. 10 c. 1 d. 0.1 e. 0.01 | b. 10 |
| Four of the five answers listed below are related by a common action. Select the exception. a. volcanic eruption b. photosynthesis c. respiration d. fire e. decomposition | b. photosynthesis |
| Which of the following stores feces immediately prior to elimination? a. small intestine b. liver c. appendix d. gall bladder e. rectum | e. rectum |
| The digestion of which class of foods begins in the mouth? a. carbohydrates b. proteins c. lipids d. amino acids e. nucleic acids | a. carbohyrates |
| The digestion of proteins begins in the a. stomach. b. pancreas. c. small intestine. d. large intestine. e. esophagus | a. stomach |
| Movement of glucose through the membranes of the small intestine is primarily by a. osmosis. b. bulk flow. c. active transport. d. diffusion. e. all of these | c. active transport |
| The liver is associated with all of the following functions EXCEPT a.inactivation of drugs. b.assembly and storage of fats. c.assembly and disassembly of certain proteins. d.degradation of worn-out blood cells. e. formation of glucagon. | e. formation of glucose |
| Lipids can serve in all but which of the following capacities? a. enzymes b. energy c. membrane structure d. insulation e. It can serve in all of these capacities. | a. enzymes |
| A deficiency of which vitamin produces rickets in children and osteomalcia in adults? a. A b. B c. C d. D e. E | d. D |
| The element needed for blood clotting, nerve transmission, and bone and tooth formation is a. iron. b. iodine. c. calcium. d. zinc. e. magnesium. | c. Calcium |
| The concentration of nitrogen in the earth’s atmosphere is approximately a. 78 percent. b. 66 percent. c. 50 percent. d. 33 percent. e. 20 percent. | a. 78% |
| As an animal grows larger, the surface area increases by the mathematical __?__ of its dimensions. a. cube b. square c. square root d. doubling e. quotient | b. square |
| The group of animals with the most efficient respiratory system is the a.amphibians. b.birds. c.mammals. d.reptiles. e. fish. | b. birds |
| The human vocal cords are located in the a. glottis. b. pharynx. c. trachea. d. larynx. e. bronchus. | d. larynx |
| The spindle apparatus is made of a. Golgi bodies. b. microtubules. c. endoplasmic reticulum. d. nucleoprotein. e. chromatids. | b. microtubules |
| Strictly speaking, mitosis and meiosis are divisions of the a. nucleus. b. cytoplasm. c. chromosomes. d. only nucleus and chromosomes. e. nucleus, cytoplasm, and chromosomes. | d. only nucleus and chromosomes. |
| Four of the five answers listed below are stages of actual nuclear division. Select the exception. a. anaphase b. prophase c. interphase d. telophase e. metaphase | c. interphase |
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marisacarpenter