Changes in the nucleotide sequence of DNA, known as _______ are the ultimate source of new alleles.

a. mediocre
b. mutagens
c. mutations
d. metamorphosis
e. metastasis


Ans: c. mutations

Biology & Microbiology

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In eukaryotic cells, replication proceeds from ________ origin(s) of replication.

A) zero B) one C) two D) many

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A(n) __________ consists of hardened parts inside the body.

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

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When performing a sequencing reaction using Sanger sequencing, which ddNTPs must be included in the reaction?

A) ddCTP B) ddATP C) ddTTP D) ddGTP E) all four ddNTPs must be present

Biology & Microbiology

Which of the following statements is true?

(a) The signal sequences on mitochondrial proteins are usually at the C-terminus. (b) Most mitochondrial proteins are not imported from the cytosol but are synthesized inside the mitochondria. (c) Chaperone proteins in the mitochondria facilitate the movement of proteins across the outer and inner mitochondrial membranes. (d) Mitochondrial proteins cross the membrane in their native, folded state.

Biology & Microbiology