The carbon source for organisms that derive their
energy from photosynthesis is
a. the soil.
b. carbon dioxide.
c. any hydrocarbon.
d. methane.
e. glucose.
Answer: b
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________-driven promoters are comprised of an Inr sequence and a TATA box with or without an associated BRE.
Fill in the blank(s) with the appropriate word(s).
Consider the transplantation of tissue from a donor to a recipient who has a different HLA type but the same ABO blood type. Why will the recipient be likely to reject a kidney from the donor, but will not reject the blood from the donor?
A. There are no Class II MHC molecules on the red blood cells in the donor blood. B. There are no Class I MHC molecules on the kidney tissue from the donor. C. There are no Class I MHC molecules on the red blood cells in the donor blood. D. There are no ABO antigens on the kidney tissue.
Which of the following is common to both meiosis and mitosis?
a. DNA replication must occur prior to these divisions. b. Homologous pairs must form. c. Cytokinesis occurs twice. d. The chromosome number does not change
Which of the following statements about cancer is false?
(a) Viruses cause some cancers. (b) Tobacco use is responsible for more than 20% of all cancer deaths. (c) A mutation in even a single cancer-critical gene is sufficient to convert a normal cell into a cancer cell. (d) Chemical carcinogens cause cancer by changing the nucleotide sequence of DNA.