A recessive allele on the X chromosome is responsible for red-green color blindness in humans. A woman with normal vision whose father is color-blind marries a color-blind male. What is the probability that a son of this couple will be color-blind?
A) 0
B) 1/4
C) 1/2
D) 3/4
E) 1
Answer: C) 1/2
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In the illustration, isoleucine can enter and exit the citric acid cycle at what point?
a. fumarate
b. succinyl CoA
c. acetyl CoA
d. acetoacetate
Three of the following statements are correct. Identify the statement that is not correct regarding genetically modified organisms.
A. There are no risks associated with GM crops. B. GM crops have been produced with increased nutrition. C. GM animals are not in our food supply. D. GM crops have been produced that are disease resistant.
Which of the following is transmission of disease from mother to fetus?
A. Direct B. Fomites C. Droplets D. Vertical E. Vector
What process is involved during rigor mortis?
The muscles’ proteins, actin and myosin, gradually break down, allowing the muscles to become stiff. Without ATP, cross-bridges cannot be broken, and within three to four hours after death, the muscles become stiff. There is an excess of ATP, and within three to four hours after death, the muscles become stiff as they go into tetanus.