If a zygote has the genotype XYY, how many total chromosomes were in the sperm before it fused with the egg?
A) 22 B) 20 C) 24 D) 21 E) 23
Answer: C
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In the citric acid cycle, malate is oxidized to form
A. fumarate. B. succinate. C. citrate. D. malate. E. oxaloacetate.
Scientists recently cloned Louis Pasteur and put him back to work in a modern lab. He promptly developed a gel that breaks down proteins. Since he hasn't been around for some time,
he's unsure what the best application for his invention might be. Help him out. What pathogenic item in this gel would be most effective and safe at eliminating? A. Viroids on the surface of agricultural plant tissues B. Prions inside the central nervous system of cows C. Viruses on the surface of the skin D. Bacteria in the intestines of human beings E. The fungus that causes athlete's foot between people's toes
Growth __________, but development __________
a. is qualitative; is quantitative b. is measured by increased cell numbers; is measured by increased cell specialization c. occurs only in infants; occurs only in adolescents d. continues throughout life; stops at puberty e. is objective; is subjective
How many unique mRNA codons can be constructed from the four different RNA nucleotides?
A. four
B. 12
C. 16
D. 61
E. 64