The central dogma of molecular biology states that information flows from:
A. DNA directly to proteins.
B. protein to RNA to DNA.
C. DNA to RNA to protein.
D. RNA to protein to DNA.
E. RNA to DNA to protein.
Answer C
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p53 is often referred to as the “guardian of the genome” by cancer research scientists. According to the diagram, which action by p53 explains its reputation?
a. Mutated p53 results in cancer.
b. p53 can trigger apoptosis.
c. p53 arrests the cell cycle if there is DNA damage.
d. p53 monitors the supply of oxygen in the environment.
In the internal leaf structure shown above, the item labeled "5" is
a. a vascular bundle. b. spongy mesophyll. c. epidermis. d. a stoma. e. palisade mesophyll.
Explain how females with the chromosome constitution XXX are often fertile with normal intelligence and lead normal lives
What will be an ideal response?
Which of the following molecules can be used as a substrate for cellular respiration?
a. glucose only b. glucose and lipids only c. glucose and proteins only d. glucose, lipids and proteins only e. glucose, lipids, proteins and fatty acids