Archives: Quiz

The following questions refer to the figure above illustrating the initial steps in the formation of recombinant DNA. The circles in “B” are a. fragments of the main bacterial DNA. b. plasmids. c. cDNA molecules. d. DNA templates. e. none […]

bolus Choose the one most appropriate statement for each. a. a process that mixes the contents of the lumen and forces it against the absorptive surface of the gut b. stimulates pancreatic bicarbonate secretion c. thin, outermost layer of stomach […]

2,4-D, a potent eudicot weed killer, is most likely a synthetic a. auxin. b. gibberellin. c. cytokinin. d. phytochrome. e. none of these. The ABO blood types are controlled by a. pleiotropy. b. multiple alleles. c. incomplete dominance. d. codominance. […]

Argon has 18 protons. How many electrons are in its third energy level? a. 2 b. 4 c. 6 d. 8 e. 10 Life probably would never have emerged on Earth if the ancient atmosphere had been the same as […]

Answer the following questions in reference to the four “habitat” items listed below. a. habitat fragmentation b. habitat island c. habitat loss d. habitat This action may result in a lack of sufficient resources to sustain the population. From what […]

Which of the following is mismatched? a. acetylcholine; muscle contraction b. endorphin; pain perception c. norepinephrine; fight-or-flight response d. serotonin; sexual function e. GABA; major inhibitor in the brain The relationship above is a. a parasitic association. b. predation. c. […]

The letter “C” in the figure above represents a. root apical meristem. b. dermal tissue. c. vascular tissue. d. ground tissues. e. ground, dermal, and vascular tissues. The life cycle of a zygomycete differs markedly from that of animals because […]

Respond to the following statements in reference to the four source tissues of plant roots listed below. a. primary meristem b. ground meristem c. pericycle d. vascular cambium This tissue gives rise to protoderm and procambium. Match the following descriptions […]

Sequencing of HIV-1 revealed that it is most closely related to which of the following? a. simian immunodeficiency virus b. feline immunodeficiency virus c. bovine immunodeficiency virus d. hepatitis B e. all of these Which of the following statements is […]

Choose the one most appropriate response for each. a. contain enzymes for intracellular digestion b. are primary cellular organelles where proteins are assembled c. package cellular secretions for export d. extract energy stored in carbohydrates; synthesize ATP; produce water and […]

A human X-linked gene is a. found only in males. b. more frequently expressed in females. c. found on the Y chromosome. d. transmitted from father to son. e. found on the X chromosome. Which components of an atom have […]

Respond to the following statements with reference to the four steps of the nitrogen cycles listed below. a. nitrogen fixation b. nitrification c. denitrification d. ammonification The process whereby nitrite is converted to nitrate is an important part of this […]

The following questions refer to the figure above illustrating transport in phloem. ____ can indicate a fruit or developing root cells. a. A b. B c. C d. D e. E Answer the following questions with reference to the bones […]

If the DNA nucleotides read ATG-CGT-GAC, the amino acid sequence of the resulting polypeptide would be a. tyrosine – alanine – leucine. b. methionine – arginine – asparagines. c. histidine – glycine – praline. d. serine – lysine – glycine. […]

hammer Choose the one most appropriate answer for each. a. dissipates excess vibrational energy to the middle ear b. contains the organ of Corti c. separates the outer and middle ears d. membrane-covered gateway to inner ear e. consists of […]

The spindle apparatus is composed of a. Golgi bodies. b. microtubules. c. endoplasmic reticulum. d. nucleoprotein. e. chromatids. According to the above table, the foraging characteristic that would benefit an animal most in a stable ecology would be? a. A […]

Choose the one most appropriate response for each. a. contain enzymes for intracellular digestion b. are primary cellular organelles where proteins are assembled c. package cellular secretions for export d. extract energy stored in carbohydrates; synthesize ATP; produce water and […]

Respond to the following statements in reference to the five plant tissues listed below. a. protoderm b. ground meristem c. procambium d. vascular cambium e. cork cambium This tissue gives rise to primary vascular tissue. Select the best choice for […]

The person in the above figure is afflicted with which of the following hormonal disorders? a. acromegaly b. dwarfism c. low levels of rhGH d. parathyroid radiation poisoning e. none of these Which of the following is a character in […]

Respond to the following statements with reference to the organ systems listed below. a. circulatory b. lymphatic c. digestive d. endocrine e. respiratory Initially encounters airborne pathogens Respond to the following statements with reference to the five components of the […]

Which of the following is the final stage of the prenatal period? a. zygote. b. blastocyst. c. embryo. d. fetus. e. infant. As a result of experimentation, a. more hypotheses may be developed. b. more questions may be asked. c. […]

Algal blooms deplete the water of a. oxygen. b. carbon dioxide. c. nitrogen. d. phosphorus. e. calcium. Respond to the following statements in reference to the five stages or structures involved in the development of the human egg. a. oogonium […]

Detritivores are a. bacteria. b. plants. c. fungi. d. animals. e. both bacteria and fungi. Some of the stages of meiosis are listed below. For the following statements, select the best choice of these stages. a. prophase I b. metaphase […]

The following are types of chemical bonds. Answer the questions below by matching the descriptions with the most appropriate bond type. a. hydrogen b. ionic c. covalent d. polar covalent e. double bond the bond type holding several molecules of […]

Which of the following areas is still seeing an increase in deforestation? a. North America b. Europe c. China d. Brazil e. None of these. Which of the following is not a property of living things? a. They can change […]

The primary producers for hydrothermal vent ecosystems are a. chemoautotrophs. b. chemoheterotrophs. c. phytoplankton. d. cyanobacteria. e. algae. The light-independent reactions of photosynthesis a. fix carbon dioxide. b. release oxygen. c. cannot occur in light. d. generate ATP. e. do […]

Fats are major constituents of a. proteins. b. genes. c. photosynthesis. d. cell membranes. e. all of these. Darwin Select the most appropriate choice for each person. a. wrote Principles of Geology b. developed the theory of catastrophism c. believed […]

The five reactions listed below occur during the noncyclic pathway of ATP formation. Use them to respond to the following statements. a. reduction of NADP+ b. phosphorylation of ADP c. photolysis of water d. oxidation of chlorophyll e. reduction of […]

Archaeans are similar to bacteria in all of the following ways EXCEPT a. size. b. shape. c. plasma membrane composition. d. absence of a nucleus. e. mode of cellular division. Most of the carbon now present in the earth’s atmosphere […]

Which of the following is NOT true of chlorofluorocarbons? a. They can destroy ozone. b. They are odorless. c. They are a greenhouse gas d. They break down very slowly. e. Their action is allowing more UV radiation through the […]

Prokaryotes are the ancestors of a. protists. b. fungi. c. plants. d. animals. e. all of these. The organism in the above photograph has which of the following structural systems? a. cartilaginous b. bone c. hydrostatic d. chitinous e. endoskeletal […]

Pituitary dwarfism may be due to insufficient production of a. mineralocorticoid. b. glucocorticoid. c. calcitonin. d. GH. e. the parathyroid hormone. Imprinting is a a. response to a stimulus. b. learned behavior that occurs during a critical time period. c. […]

Respond to the following statements in reference to the five stages or structures involved in the development of the human egg. a. oogonium b. primary oocyte c. secondary oocyte d. polar body e. corpus luteum This structure becomes the mature […]

A one-way relationship in which one species benefits at the expense of another is a. commensalism. b. competitive exclusion. c. parasitism. d. obligate mutualism. e. a neutral relationship. RNA can be used as a template for the production of DNA […]

The only group of fungi to have a flagellated stage are the a. Chytrids. b. Ascomycetes. c. Basidiomycetes. d. Glomeromycetes. e. Zygomycetes. What is an acceptable probability of sampling error that may have skewed the results in most scientific studies? […]

The extra-embryonic membrane that forms the majority of the placenta is the a. amnion. b. allantois. c. chorion. d. yolk sac. e. umbilical cord. The sequence of amino acids is the ____ structure of proteins. a. primary b. secondary c. […]

The nuclear membrane re-forms during a. anaphase. b. metaphase. c. interphase. d. prophase. e. telophase. In comparing mitosis and meiosis, which of the following statements is true? a. Meiosis I is more like mitosis than is meiosis II. b. Both […]

Which of the following statements is true of metabolic pathways? a. They are enzyme-mediated sequences of reactions. b. They may be biosynthetic or degradative. c. Photosynthesis is a biosynthetic pathway. d. Catabolism is a degradative pathway. e. All of these […]

Hominins Choose the one most appropriate answer for each. a. a group that includes apes and humans b. a population of Homo spp. that lived from at least 100,000 to as recently as 30,000 years ago; tool users and artisans […]

Chromatids that are attached at the centromere are called what kind of chromatids? a. Mother b. Daughter c. Sister d. Programmed e. either mother or daughter Within a single motor neuron, the direction an impulse follows is a. dendrite >>> […]

Cerebellum Choose the most appropriate answer. a. integrates body position, motions, balance b. in cnidarians; based on reflex pathways devoted to swimming and feeding c. messages from here arouse the brain and maintain wakefulness d. the cortical region that coordinates […]

The figure is a photomicrograph of a. a nucleus. b. a Golgi body. c. endoplasmic reticulum. d. a vacuole. e. a nucleoid. Answer: A The following questions refer to the age structure diagrams above. The age structure diagram for countries […]

Suppose you laid a seedling on its side so that the root was parallel to the ground as shown in the figure above. Several hours after the change in position, where in the root cells (position A, B, or C […]

The figure above shows a nephron. Filtration takes place in the structure labeled _____. A) a B) b C) c D) d Answer: A Which of the following life history traits can potentially influence effective population size? I) age of […]

Use the following information to answer the question(s) below. For several decades now, amphibian species worldwide have been in decline. A significant proportion of the decline seems to be due to the spread of the chytrid fungus, Batrachochytrium dendrobatidis (Bd). […]

The virus genome and viral proteins are assembled into virions (virus particles) during _____. A) the lytic cycle and the lysogenic cycle in all known host organisms B) the lysogenic cycle only C) the lytic cycle only D) the lytic […]

Use the following information to answer the question(s) below. A farm pond, usually dry during winter, has plenty of water and aquatic pond life during the summer. One summer, Sarah returns to the family farm from college. Observing the pond, […]

Eutrophication is often caused by excess limiting nutrient runoff from agricultural fields into aquatic ecosystems. This results in massive algal blooms, which eventually die and decompose, ultimately depleting the dissolved oxygen and killing large numbers of fish and other aquatic […]

Which molecule shown above can function as a base? A) A B) B C) C D) D Which of the following is a true statement about asexual reproduction in plants? A) Clones of plants do not occur naturally. B) Cloning, […]

In liver cells, the inner mitochondrial membranes are about five times the area of the outer mitochondrial membranes. What purpose must this serve? A) It allows for an increased rate of glycolysis. B) It allows for an increased rate of […]