Which of the following is not a mechanism by which viruses cause cancer?
A. They encode proteins that bind to and inactivate host cell proteins known as tumor suppressor proteins.
B. An expression of viral proteins results in abnormal expression of genes that regulate cell growth and reproduction.
C. They carry a cancer-causing gene into the cell.
D. They produce defective interfering particles.
Answer: D
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Describe how DNA packing occurs in eukaryotes using the terms nucleosome, 30 nm fiber,
euchromatin, and heterochromatin. Then describe how DNA is packed in prokaryotes.
What will be an ideal response?An organelle found in the nucleus is known as a ____
a. nucleolus b. plastid c. vacuole d. microvillus e. basal body
Which of the following is not a gas-forming microbe used to make bread?
A. Coliform bacteria B. Heterofermentative lactic acid bacteria C. Clostridium perfringens D. Streptococcus lactis E. Saccharomyces cerevisiae
The digestive systems of carnivores typically
a) include relatively long intestines with colonies of bacteria b) contain gizzards for digesting seeds c) have more than one stomach to digest cellulose d) are short and produce fast-acting enzymes