Archives: Quiz

Reconstructing evolutionary relationships helps in differentiating between primitive and derived characteristics. Th2 cells produce a cytokine that promotes growth and activation of other T cells and activates macrophages. Answer: FALSE Poly-β-hydroxybutyric acid (PHB) is a carbon- and energy-storing polymer. Answer: […]

Staphylococcus aureus and Streptococcus pyogenes produce exotoxins known as superantigens that bind to a site on the TCR that is outside the antigen-specific TCR binding site. Acidic foods generally need a higher canning temperature than do nonacidic foods. Answer: FALSE […]

The amino acid composition of thermostable proteins is not particularly unusual, except for a bias for increased levels of amino acids that form α-helices. Both environmental conditions and nutrient resources strongly influence the composition of a microbial community. Answer: TRUE […]

At present there are four phyla in the domain Bacteria. Transposons can be found on many genetic elements, including plasmids, chromosomes, and viral genomes. Answer: TRUE Both hydrophilic and charged molecules readily diffuse through the cytoplasmic membrane. Answer: FALSE The […]

Anthrax is an emerging disease for which there is no treatment or vaccine available. Genomics analysis of recently isolated viruses indicate some viruses contain larger genomes than the some bacterial genomes. Answer: TRUE During elongation of a cell during binary […]

Bacteria that are capable of oxidizing both iron and sulfur usually have a strong preference for sulfur oxidation because it yields more energy. Rhodobacter and Roseobacter are two genera with a common ancestor in Alphaproteobacteria. Answer: TRUE Th17 cells are […]

Despite being called the reverse citric acid cycle, it is currently identified as the most ancient autotrophic pathway. Although the sulfate-reducing bacteria are thought to be critical in the corrosion of metal structures, the mechanism of metal corrosion is not […]

In natural samples it is often difficult to differentiate live cells from dead cells or cells from nonliving matter. Metabolism is a unifying characteristic of all cellular organisms. Answer: TRUE The purpose of the enrichment culture technique is to enrich […]

Epigenetic effects are the result of: a. a change in the RNA sequence. b. DNA methylation. c. RNA methylation. d. a change in the DNA sequence. e. all of these option. Which of the following is NOT true of xylem? […]

At what partial pressure of oxygen do half the heme groups in human blood have oxygen bound? a. 30 mm Hg b. 100 mm Hg c. 70 mm Hg d. 104 mm Hg e. all of these The above photomicrograph […]

Radioactive isotopes have a. excess electrons. b. excess protons. c. excess neutrons. d. insufficient neutrons. e. insufficient protons. Electron transfer phosphorylation Select the one most appropriate choice for each. a. produces NADH and CO2; pyruvate oxidized b. produces ATP, NADH, […]

Which of the following are considered more primitive based upon the structure of their limbs? a. bats b. reptiles c. porpoises d. penguins e. birds The cell walls of fungi are composed mainly of a. cellulose. b. lignin. c. chitin. […]

Answer the following questions with reference to the bones listed below. a. clavicle b. lumbar vertebra c. tibia d. metatarsal e. metacarpal A ruptured disk is next to this bone. Glycolysis-Glucose Breakdown Starts Which of the following is indicated by […]

Which of the following is NOT a contributing factor in species extinction? a. habitat loss b. overharvesting c. habitat fragmentation d. conservation biology e. illegal wildlife trading Use the figure above to answer the following questions. The letter “B” in […]

Which of the following is not largely secreted by the gonads? a. estrogen. b. testosterone. c. progesterone. d. all of these. e. none of these. Which of the following is not a likely outcome of global warming? a. Extinction of […]

Which of the following do not depend directly on sunlight for energy? I. terrestrial producers II. animal consumers III. decomposers a. I only b. II and III only c. II only d. III only e. I and III Which of […]

The following nutrient most associated with eutrophication is: a. iron. b. hydrogen. c. oxygen. d. carbon. e. phosphate. vascular cambium Match all applicable letters with the appropriate term(s). Letters may be used more than once, and a term may have […]

Because of its location in the electron transfer chain, delivery of electrons to each NADH results in ____ ATPs. a. 4 b. 2 c. 3 d. 32 e. 0 Melanin protects the skin from a. desiccation. b. abrasion. c. ultraviolet […]

Randomly selecting samples of experimental units from an environment can result in a. sampling error. b. blind testing. c. evidence. d. experimental design. e. consensus. Water is important to the interactions of biological molecules because it a. promotes hydrophobic and […]

Response Even though there may be more than one correct letter response to some numbered items, discriminate and “juggle” so that you have the one BEST response for each. a. cells that nurture and support neurons b. a hyperpolarizing event […]

The sex chromosome composition of a person with Turner syndrome is a. XXX. b. XO. c. XXY. d. XYY. e. none of these. The presence of the strongest competitors in the center of a group of animals may qualify the […]

The greatest amount of nutrient absorption takes place in the a. stomach. b. small intestine. c. colon. d. pancreas. e. esophagus. The primers in PCR are a. fragments of mRNA. b. designed to base pair with mRNA. c. free nucleotides. […]

Match the following descriptions with the most appropriate group listed below. a. Bacteria b. Protista c. Plantae d. Fungi e. Animalia prokaryotic Which event occurs during the elongation stage? a. Peptide bonds form. b. Free amino acids bind to the […]

q2 Choose the most appropriate letter for each. a. a reference point that implies stability of gene frequencies through generations b. encompasses all of those actually or potentially interbreeding populations that are reproductively isolated from other such groups c. the […]

The most likely reason that glucose dissolves in water is that it is a. an ionic compound. b. a polysaccharide. c. polar and forms many hydrogen bonds with the water molecules. d. a very unstable molecule. e. highly nonpolar. Settlers […]

Uracil will pair with a. ribose. b. adenine. c. cytosine. d. thymine. e. guanine. When a cell undergoes mitosis, a. the daughter cells have identical genes. b. the daughter cell has genes identical to those of the mother cell that […]

Which of the following is found in cocoa? a. Epicatechin. b. Caffeine. c. Resveratrol. d. Curcumin. e. Nicotine. Which of the following is NOT characteristic of sensation? a. Some sensory receptors are activated only by chemicals. b. Nerve impulses mediating […]

The archea include which of the following? a. extreme thermophiles b. alga c. protista d. animals e. all of these It is now possible to analyze the genetics of the new generation by a. fetoscopy. b. amniocentesis. c. chorionic villi […]

Which group is most closely related to fungi? a. radiolarians b. stramenopiles c. alveolates d. choanoflagellates e. oomycotes Respond to the following statements with reference to the five biomes listed below. a. tundra b. grassland c. desert d. taiga e. […]

Respond to the following statements in reference to the five endocrine glands listed below. a. pituitary b. adrenal c. pancreas d. thyroid e. thymus This gland is the target for corticotropin (ACTH). Genes located in cells in different regions of […]

The second law of thermodynamics states that a. energy can be transformed into matter, and because of this, something is obtained for nothing. b. energy can be destroyed during nuclear reactions such as those that occur inside the sun. c. […]

Ethylene Choose the one most appropriate answer for each. Some letters may not be used. a. flower each successive year or after several years of vegetative growth b. promotes cell elongation in stems c. has receptor sites for a particular […]

If a child more strongly resembles one parent’s physical traits than the other parent’s, the explanation could be due to chromosome movements during a. anaphase II. b. metaphase II. c. prophase II. d. anaphase I. e. telophase I. Respond to […]

Fossils include a. skeletons. b. shells. c. seeds. d. tracks. e. all of these. The following questions refer to the figure above. The structures labeled “B” in the figure are a. zygospores. b. haploid spores. c. ascospores. d. gametes. e. […]

Triploidy Choose the most appropriate answer for each. a. 3n; generally sterile b. a chromosome segment is permanently transferred to a nonhomologous chromosome c. (2n  1); a zygote deprived of a chromosome d. a repeat of a particular DNA […]

Birds and crocodiles share which of the following characteristics? a. ectothermy (body temperature regulated by environment) b. body hair c. four-chambered heart d. lung design e. light-weight bones Muscle spindle Even though there may be more than one correct letter […]

Which represents the lowest degree of certainty? a. hypothesis b. conclusion c. fact d. principle e. theory Respond to the following statements in reference to the five items listed below. a. antigens b. antibodies c. helper T cells d. cytotoxic […]

Friedrich Miescher is credited with a. proposing DNA as the hereditary material. b. determining that proteins are the physical basis of inheritance. c. defining the laws of inheritance. d. discovering DNA. e. determining that proteins are composed of unlimited combinations […]

Plants cannot ____ in the dark. a. grow b. respire c. move d. utilize chlorophyll e. sense light Match the following letters to the number with which they best correspond. a. Observation b. Question c. Hypothesis d. Prediction e. Observational […]

conservation biology Choose the one most appropriate answer for each. a. a reduction in suitable places to live b. organisms that give an “early warning” signal of changes in biodiversity c. new method of harvesting trees to preserve diversity d. […]

Which of the following statements is false? a. The greatest amount of photosynthesis takes place in the palisade mesophyll. b. There are more stomata on the upper epidermis of most leaves than on the lower epidermis. c. The palisade mesophyll […]

Microvilli are indicated by a. A. b. B. c. C. d. D. e. E. hypothalamus Choose the one most appropriate answer for each. a. secretes one hormone that increases the metabolic rate and another that inhibits calcium release from bone […]

In rabbits, there are four alleles at the c locus. Arranged in dominance sequence they are: C (agouti), cch(chinchilla), ch(Himalayan), and c (albino) Use the figure above illustrating honeybee dances to answer the following questions. A dance that recruits other […]

Which of the following statements is false? a. Ovulation occurs when the follicle ruptures and releases an egg. b. The zygote divides by mitosis during cleavage. c. Fertilization occurs in the upper regions of the oviduct. d. The blastocyst implants […]

The woman in the above photograph has been afflicted by a. low iodine in the diet. b. hypothyroidism. c. vitamin D deficiency. d. testosterone excess. e. progesterone deficiency. A molecule is a. a combination of two or more atoms. b. […]

Which of the following is false regarding age-related macular degeneration? a. It results in progressive destruction of photoreceptors in the fovea and surrounding region. b. It clouds the center of the visual field. c. It has no genetic basis. d. […]

What feature is common to all the alveolates? a. heterotrophy b. lung-like sacs used for respiration c. bioluminescence d. complex life cycle with two hosts e. membrane-bound sacs beneath the plasma membrane Pheromones a. are signaling molecules. b. are released […]

tropical rain forest Choose the one most appropriate answer for each. a. northern coniferous forest b. increases oceanic productivity c. mosaics of tall, coarse grasses, shrubs, and low trees; even, humid forests; high rainfall d. stratified on rocky coasts e. […]

The following questions refer to the figure above illustrating logistic growth. The initial carrying capacity of an environment is indicated by a. A. b. B. c. C. d. D. e. E. The following phrases refer to the eukaryotic cell cycle. […]

The plant hormone that promotes fruit ripening is a. auxin. b. gibberellin. c. cytokinin. d. abscisic acid. e. ethylene. The first eukaryotic fossils are dated to about a. 3.8 billion years ago. b. 2.1 billion years ago. c. 1.5 billion […]