Most RNA viruses carry which of the following enzymes?
A) DNA-dependent DNA polymerase
B) lysozyme
C) RNA-dependent RNA polymerase
D) reverse transcriptase
E) ATP synthase
C
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The probability that a gene will be altered by a mutation is called the mutation rate
Indicate whether the statement is true or false
In humans, normal skin pigmentation is influenced by a dominant gene (C), which allows pigmentation to develop
All individuals who are homozygous for the recessive allele (c) are unable to produce an enzyme needed for melanin formation and are therefore referred to as albino. Two normal parents produce an albino child. What are the chances that the next child will be an albino? What will be an ideal response?
The influenza viruses that infect man usually are derived from a type that could also infect:
a. Horses and sheep b. Cattle and water buffalo c. Chimpanzees and gorillas d. Birds and pigs e. A variety of primates
Which of the following is not a regulatory mechanism used to control the tryptophan operon in Escherichia coli?
A. Attenuation B. Repression C. Catabolite repression D. All of the choices are correct.