Which of the following is not a mechanism by which viruses cause cancer?

A. An expression of viral proteins results in abnormal expression of genes that regulate cell growth and reproduction.
B. They carry a cancer-causing gene into the cell.
C. They encode proteins that bind to and inactivate host cell proteins known as tumor suppressor proteins.
D. They produce defective interfering particles.


Answer: D

Biology & Microbiology

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In tetrad analysis, NPD asci can result from (Select all that apply.)

A) independent assortment of unlinked genes. B) double crossovers between linked genes. C) single crossovers between linked genes. D) single crossovers between a gene and a centromere.

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Kelp beds are considered important because they support large

a. fish. b. sea urchins. c. diverse communities. d. sea otters. e. sharks.

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Four of the five animals listed below are ruminants

Select the exception. a. deer b. cattle c. antelopes d. goats e. bears

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The inner membrane system of chloroplasts consists of flattened sacs called ________ that form stacks called ________.

What will be an ideal response?

Biology & Microbiology