Which of the following is/are necessary for the replication of a satellite virus?
A. Host cell only
B. Prion only
C. Helper virus only
D. Host cell and helper virus
Answer: D
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In mismatch repair, enzymes remove incorrectly-paired nucleotides
__________________ Indicate whether the statement is true or false.
When molecules diffuse, they move ________
a. down their own concentration gradient unless there are other molecules also diffusing in the vicinity b. up their own concentration gradient unless there are other molecules also diffusing in the vicinity c. up their own concentration gradient without regard to the gradients of other molecules d. down their own concentration gradient without regard to the gradients of other molecules
When many alleles exist for the same gene, the ________ types are variants.
Fill in the blank(s) with the appropriate word(s).
Which of the following bacterial genera is useful for the degradation of environmental pollutants?
A. Actinomyces B. Streptomyces C. Corynebacterium D. Rhizobium E. Nocardia