California State University, Fullerton » Biology » Biology 251 - Genetics » Spring 2021

Question #1

The genetic code has ____________ codons for the 20 amino acids found in proteins.

A. 50

B. 45

C. 64

D. 20

E. 61

Question #2

The triplet codon spacing defines _____________ in the mRNA that encode a polypeptide.

A. translation brackets

B. exons

C. transcription units

D. anticodons

E. reading frames

Question #3

A protein made up of only one polypeptide chain shows quaternary structure.

A. True

B. False

Question #4

Protein structures like alpha-helix and beta sheets are examples of ____________ structure.

A. tertiary

B. secondary

C. quaternary

D. primary

Question #5

In molecular biology, it possible to express gene from one organism in another because:

A. the genetic code is redundant.

B. the genetic code is degenerate.

C. the genetic code is universal.

D. there are only 20 amino acids.