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Biology Practice Test #8

1 / 40

This organ secretes the hormone responsible for the flight-or-flight response.

2 / 40

A human hereditary disorder that is present only in males is most likely

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As a reaction proceeds, reactants form a transition state, which then forms the products. An enzyme affects the energy of the

4 / 40

Question below refers to the phylogenetic tree of fly families shown. According to the phylogenetic tree, which speciation event occurred EARLIEST?

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Which of the following plays an important role in the human immune system

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A somatic cell of the common octopus (Octopus vulgaris) has 56 chromosomes. What number of chromosomes will an octopus gamete contain?

7 / 40

During which phase of mitosis do the centromeres split?

8 / 40

Which of these is an example of polygenic inheritance?

9 / 40

Some rocks feature red bands or streaks made up of iron oxides, formed when iron reacts with oxygen. These originated from dissolved iron in the oceans, which formed oxides and settled to the ocean bottom. What allowed this chemical and physical process to occur?

10 / 40

This nucleic acid is associated with histone proteins.

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Which of these mutations in a gene will MOST LIKELY result in a shortened protein with a long sequence of substituted amino acids?

12 / 40

A genetic mutation that adds a nucleotide to a protein-coding sequence of DNA creates an early stop codon. How will this influence the resulting protein?

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In fruit flies, brick-red eye color is dominant to a bright orange color called cinnabar. A fruit fly with heterozygous eye color geno-type is crossed with homozygous recessive fruit fly. What is the probability of inheritance for the cinnabar phenotype and the heterozygous genotype?

14 / 40

Which of the following substances are produced by the light reactions of photosynthesis?

15 / 40

Which type of biome is found at the lowest latitudes?

16 / 40

Ground tissue with no specialized function

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Which of these plant forms are diploid? I. Spore II. Sporophyte III. Gametophyte

18 / 40

This organ secretes growth hormone (GH).

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Human ABO blood typing is determined by the proteins present on red blood cells. The gene that codes for these proteins has three alleles: IA, IB, and i. IA codes for protein type A, IB codes for protein type B, and i codes for the absence of protein. IA and IB are codominant and i is recessive to both IA and IB. A woman with blood type A and a man with blood type AB marry and produce children. Which of the following blood types is NOT possible in their children?

20 / 40

How does the ATP synthase enzyme function in the cell?

21 / 40

All of the following are true about the endocrine system EXCEPT

22 / 40

An original cell replicates its DNA. The cell undergoes mitosis and cell division, and one of the daughter cells replicates its DNA. Which of these BEST describes the DNA of the second-generation daughter cells?

23 / 40

Which of the following individuals is the LEAST fit in evolutionary terms?

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An organism produces many offspring each reproductive season, only a few of which survive. The survivorship curve for this organism can BEST be described as

25 / 40

Homologous structures, which have similar underlying structures but may have different functions, are formed by

26 / 40

A unicellular prokaryote belongs to which kingdom?

27 / 40

Permits gas exchange and transpiration in leaves

28 / 40

Which pair of organisms is likely to engage in interspecific resource competition?

29 / 40

Which of the following plays an important role in the human immune system

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In what order did the following types of organisms appear in the history of life on Earth? I. Eukaryotes II. Heterotrophic organisms III. Metazoa IV. Photosynthetic organisms

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The steps of protein synthesis and modification take place in several different locations throughout the cell. What is the proper order of these locations, from start to finish? I. Ribosome II. Nucleus III. Golgi apparatus IV. Endoplasmic reticulum

32 / 40

Homologous chromosomes separate in this phase.

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At which stage of meiosis do cells from a sperm cell precursor contain a haploid set of chromosomes, each consisting of two sister chromatids?

34 / 40

Which of these is the MOST LIKELY result of blood calcium levels falling too low?

35 / 40

What fragments would be produced if the following plasmid were to be digested with EcoRI and HindIII to completion?

36 / 40

A solute cannot move into a cell by crossing the phospholipid bilayer of the membrane. It can, however, enter through a membrane protein. The fact that solute molecules are entering the cell MOST LIKELY indicates that

37 / 40

A lake filled with algae that are choking out aquatic plants and fish is likely experiencing which process?

38 / 40

Which of these describes a characteristic of the induced-fit model but not the lock-and-key model?

39 / 40

All of the following take place in the thylakoid of the chloroplast EXCEPT

40 / 40

Which of these carries deoxygenated blood? I. Pulmonary veins II. Anterior vena cava III. Pulmonary arteries

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