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QUESTION 7

What is the purpose of gap junctions?

A. To prevent the leakage of extracellular fuid.

B. To provide cytoplasmic channels between adjacent plant cells.

C. To fasten cells together.

D. To provide cytoplasmic channels between adjacent animal cells.

QUESTION 8

During which phase of the cell cycle do homologous pairs of chromosomes line up on the metaphase plate?

A. Metaphase III

B. Metaphase I

C. Metaphase

D. Metaphase II

QUESTION 9

Which one of the following is NOT a mechanism that contributes to genetics variation?

A. Random pairing of homologous chromosomes

B. Random fertilization

C. Crossing over

D. Independent assortment of chromosomes

QUESTION 10

Generally speaking, how does a proto-oncogene become an oncogene?

A. The proto-oncogene is an inactive precursor protein that is cleaved to form the mature oncogene.

B. The proto-oncogene is phosphorylated, altering the function to that of an oncogene.

C. Proto-oncogenes can never become oncogenes. These are two completely different things.

D. The proto-oncogene is mutated, altering the function to that of an oncogene.

QUESTION 11

During which process are gametes (sperm and egg) produced?

A. Mitosis

B. Budding

C. Binary Fission

D. Meiosis

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Trinidad Tremblay
Trinidad TremblayLv2
28 Sep 2019

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Which of the following statements is FALSE?

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Which of the following terms correctly describes a compound featuring more than one double bond?

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Eukaryotic mRNA transcripts are protected from modification by

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a. 5' caps

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Complete the following sentences: "Primary active transport is dependent on __________. Secondary active transport is dependent on __________ created by __________.

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a. CO2

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Gel electrophoresis separates DNA fragments according to their:

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a. base sequence

b. size

c. percentage of labelled nucleotides

d. electrical charge

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G0 is:

Select one:

a. part of interphase

b. the phase of the cell cycle where DNA replication occurs

c. the phase of the cell cycle where two identical daughter cells are created

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At which pH will the concentration of hydrogen ions be equal to the concentration of hydroxide ions?

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a. pH 1

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Which of the following enzymes has proofreading activity?

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b. Helicase

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The process of _______________ cuts introns from the primary transcript and the final "processed" mRNA is produced.

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a. RNA cleaving

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Transcription is initiated when RNA polymerase binds to

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a. a promoter

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d. a codon

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Complete the following sentences: "__________ connect the extracellular matrix with microfilaments. __________ connect intermediate filaments from adjacent cells."

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Control of gene expression in eukaryotic cells occurs at which level(s)?

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a. only the transcriptional level

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Cellular organelles containing hydrolytic enzymes are called:

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a. peroxisomes

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______ are chemicals or combinations of chemicals that take up excess hydrogen ions or hydroxide ions in order to keep the pH constant.

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a. acids

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Which of the following proteins appear in some stages of the cell cycle and are degraded at other stages?

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a. kinases

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c. nucleotides

d. phosphatases

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Which of the following correctly matches an organelle with its function?

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a. mitochondrion photosynthesis

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d. lysosome movement

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What is the sequence corresponding to the following electropherogram obtained by Sanger sequencing (green: A; red:T; black: G; blue: C)?

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a. CCGTTATGAAC

b. GGCTTATGAAG

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Which of the following statement is true

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The energy-requiring process by which small molecules are joined to form larger molecules is specifically called

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a. metabolism

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When DNA replication starts

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A(n)_______ is the movement of a segment of a chromosome from one chromosome to another nonhomologous chromosome

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d. duplication

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Complete the following sentences: "Replication forks from the same origin of replication extend __________. __________ DNA strand is used as template for the leading strand at one fork and for the lagging strand at the second fork. New DNA is synthesized from 5' to 3' on the __________."

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e. bidirectionally, The same, both the leading and lagging strands

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Manufacturing recombinant DNA molecules involves cutting a gene from its normal location, inserting it into a circular piece of DNA from a bacterial cell, and then transferring the circle of DNA to cells of another species. Which of the below describe the circular piece of DNA?

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Complete the following chemical equation to make it balanced: glycerol + ___ ? triacylglycerol + ___

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Which structure is found in plant cells but not animal cells? Check all that apply.

Select one or more:

a. Cell wall

b. Chloroplast

c. Plastid

d. Central vacuole

e. Lysosomes

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