A mutation in the tRNA for the amino acid lysine results in the anticodon sequence 5?-UAU-3? (instead of 5?-UUU-3?)
Which of the following aberrations in protein synthesis might this tRNA cause?
(a) read-through of stop codons
(b) substitution of lysine for isoleucine
(c) substitution of lysine for tyrosine
(d) substitution of lysine for phenylalanine
(b) The mutant tRNALys will be able to pair with the codon 5?-AUA-3?, which codes for isoleucine.
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Phenotypic sex is determined at the moment of fertilization
a. True b. False Indicate whether the statement is true or false
In sweet peas, dominant alleles C and P are necessary for colored flowers. In the absence of either (__ pp or cc __) or
both (cc pp), the flowers are white. Give the probable genotype of a plant with colored flowers and a plant with white flowers that produced 38 plants with colored flowers and 42 plants with white flowers. What will be an ideal response?
In saltatory conduction, nerve impulses jump from one exposed region of the axon to another. This exposed region is called the ________
A) motor end plate B) node of Ranvier C) Schwann cell gap D) interneurons
The only animal in which digestion occurs within cells is
A. cnidarians. B. sponges. C. flatworms. D. comb jellies.