What is a point mutation?

A) a mutation that affects only one metabolic pathway
B) a mutation found at a single base pair in the genome
C) a mutation that affects a single cell
D) a mutation in which one chromosome is lost
E) an error in DNA that is caused by malfunctioning of DNA ligase


Answer: B

Biology & Microbiology

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Which of the following is in the correct order for one cycle of polymerase chain reaction (PCR)?

A) Denature DNA; add fresh enzyme; anneal primers; add dNTPs; extend primers. B) Add fresh enzyme; denature DNA; anneal primers; add dNTPs; extend primers. C) Anneal primers; denature DNA; extend primers. D) Extend primers; anneal primers; denature DNA. E) Denature DNA; anneal primers; extend primers.

Biology & Microbiology

During contraction, muscle fibers will __________ in length but __________ in thickness

Fill in the blank(s) with the appropriate word(s).

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The shoot tip is indicated by

a. A. b. B. c. C. d. D. e. E.

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Ribosomes are a type of (apoenzyme/enzyme/ribozyme).

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology