Matthew has the inherited form of the eye cancer retinoblastoma (RB). His disease is caused by
A) a germline mutation in one RB allele and no mutation in the other allele.
B) a somatic mutation in each copy of the RB gene in the same cell.
C) a germline mutation in one RB allele and a somatic mutation in the other allele.
D) a somatic mutation in one of the RB genes in the same area of the retina of one eye.
C) a germline mutation in one RB allele and a somatic mutation in the other allele.
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Refer to the figure above. What is the function of the ACC sequence at the end?
A) It attaches to an amino acid. B) It base pairs with the codon of mRNA. C) It stabilizes the tRNA-amino acid complex. D) It is the active site of this ribozyme.
Four of the following are shared characteristics of parabasalids and diplomonads. Which is the exception?
A. Heterotrophic B. Flagella C. Oxygen-poor or anaerobic habitats D. Abundant mitochondria E. Live in animals
Plants with mutant ABA receptors are likely to have problems with
A. pollen tube formation. B. fertilization. C. seed dormancy. D. endosperm formation.
Enzyme activity can be greatly affected by the pH and the temperature of the environment in which the enzyme must function.
Answer the following statement true (T) or false (F)