A mutation in yeast makes it unable to convert pyruvate to ethanol. How will this mutation affect these yeast cells? The mutant yeast cells will _____
A) be unable to grow anaerobically
B) grow anaerobically only when given glucose
C) be unable to metabolize glucose
D) die because they cannot regenerate NAD+ from NAD
E) metabolize only fatty acids
Answer: A
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A. polio. B. dracunculiasis. C. measles. D. plague. E. polio, dracunculiasis, AND measles.
The cell body of a motor neuron resides in the spinal cord, but it may control muscles a long distance away. In a giraffe, the ________ of a leg motor neuron may be six feet long!
A. node of Ranvier B. soma C. axon D. dendrite
Mice have a set of multiple alleles of a gene for coat color
Four of those alleles are as follows: C = full color (wild) cch = chinchilla cd = dilution c = albino Given that the gene locus is not sex-linked and that each allele is dominant to those lower in the list, diagram the crosses indicated below and give the phenotypic ratios expected from each. (a) wild (heterozygous for dilution) × chinchilla (heterozygous for albino) (b) chinchilla (heterozygous for albino) × albino
A transducing phage
a. cannot infect new host cells. b. is a lysogenic bacteriophage. c. contains fragments of the host chromosome instead of the viral genome. d. has a viral coat made of host proteins.