Insertions and deletions of single nucleotides:
A. cause nonsense mutations.
B. cause frameshift mutations.
C. add or delete amino acids to/from the
normal polypeptide.
D. shorten chromosomes.
E. cause cancer.
B
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Unsaturated fatty acids are those containing carbon-carbon ________ bonds.
Fill in the blank(s) with the appropriate word(s).
When both dominant and recessive alleles are present within a single nucleus, the organism is for the trait.
(a) diploid (b) haploid (c) homozygous (d) heterozygous
The influenza virus is typical of many animal viruses in that is has an envelope composed of lipids and glycoproteins. Which of the following statements about the envelope is ACCURATE?
A. The envelope glycoproteins are encoded by genes found in the host genome. B. The envelope is inside the capsid. C. The envelope is obtained from the host cell when the virus buds from the plasma membrane. D. The envelope is obtained from the host cell upon entry into the cell. E. The envelope is formed via the action of integrase.
If a cell contains 84 sister chromatids at metaphase of mitosis, how many chromosomes will be present in each
nucleus in late telophase?
a. 168 b. 84 c. 42 d. 21 e. cannot be determined from the information given