What happens when an animal cell is placed into a hypertonic solution?
A. plasmolysis
B. crenation occurs
C. it swells
D. it is unchanged
B. crenation occurs
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An allele is:
A. one of several forms of a gene. B. the particular combination of genes for a given trait in a given organism. C. the expression of a trait in an individual. D. the location of a gene on a chromosome. E. none of these.
The name of the enzyme used by Nirenberg and Matthaei to synthesize RNA primers to direct in vitroprotein synthesis using cell extracts is:
A. polynucleotide phosphorylase. B. ribonucleotide synthetase. C. ribonucleotide reductase. D. deoxyribonuclease.
Which of the following items will not help treat or eliminate the symptoms of genetic disorders?
a. Dietary controls b. Hormone replacement therapy c. Exposure to carcinogens d. Prescription drugs e. Surgery
The region of an enzyme that catalyzes reactions is called a(n)
This diagram shows the basic structure and function of an enzyme, acting to catalyze a cell's chemical reaction.
A. cofactor site.
B. binding pocket.
C. reaction site.
D. catalyst site.
E. active site.