Self-cleaving RNAs that function catalytically are called
A) snRNPs.
B) snRNAs.
C) ribozymes.
D) ribosomes.
E) spliceosomes.
C
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In Africa and other parts of the world, malaria parasites can cause deadly illness. Individuals who are heterozygous for sickle-cell anemia can produce a resistance to the malaria infection. This is known as
A. heterozygote disadvantage. B. heterozygote advantage. C. polygenic inheritance. D. pleiotropy. E. homozygote advantage.
During the pre-embryonic period, a single sperm passes through the zona pellucida. In the vast majority of cases, where does this process occur?
A) in the uterus B) in the ovary C) in the oviduct (fallopian tube) D) in the placenta
Replacement-level fertility requires a total
fertility rate of a. 2.0 b. 2.1 c. 2.4 d. 2.6 e. 2.8
Which statement regarding skin cells and muscle cells in your body is true?
A) Muscle cells contain information about muscle proteins but not about skin color. B) Skin cells contain information about skin color but not about muscle proteins. C) Muscle cells contain information about skin color but not about muscle proteins. D) Skin cells and muscle cells each contain information about both muscle proteins and skin color.