When two or more separate mutlicellular algae stages occur in succession during the life cycle, we call this:
a. gametangia.
b. fragmentation.
c. sporangium.
d. alternation of generations.
D
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Which of the following statements about the mRNA start codon is INCORRECT?
A. The start codon is only a few nucleotides from the ribosomal binding site. B. The start codon is usually GGA. C. The start codon is usually AUG. D. The start codon specifies the amino acid, methionine. E. The start codon defines the reading frame.
In an experiment examining adrenergic receptors, epinephrine alone was not able to trigger an increase
in cAMP, but when beta receptors were fused with animal cells, there were high levels of cAMP. What was occurring?
a. activation of epinephrine. b. protein kinase inhibition. c. activation of adenylyl cyclase. d. protein kinase amplification. e. both activation of adenylyl cyclase and protein kinase amplification.
When making a karyotype, what is the effect of placing lymphocytes in a low-salt solution?
A. It makes the chromosomes more visible. B. It initiates cell division. C. It stops the cells in metaphase. D. It helps separate the chromosomes. E. It causes the cells to swell.
In rabbits, coat color is governed by four alleles: C for dark gray, Cch for chinchilla, Ch for himalayan, and c for white
Each individual rabbit inherits a combined total of _____ coat color allele(s) from its parents. a. zero b. one c. two
d. three e. four