Genes with large numbers of _____________ base pairs are more likely to have a higher mutation rate
than genes with large numbers of ___________ base pairs. Fill in the blank(s) with the appropriate word(s).
ANS: G/C; A/T
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A particular reaction has a negative delta G. However, this reaction takes many years to proceed in the absence of enzyme. Why is this the case?
A. This reaction does not obey the second law of thermodynamics B. This reaction does not proceed spontaneously C. The initial free energy of the reactants is much less than the final free energy of the products D. A certain amount of activation energy is required for the reaction to proceed
The frequency of heterozygotes for cystic fibrosis shows ethnic variations. Indicate whether the statement is true or false
Plants are susceptible to bacterial infections, which can damage their structure or even kill them. Which of the following would be the best antibiotic to treat a plant that is infected with bacteria?
A) a drug that interferes with mitochondria function B) a drug that disrupts cell wall structure and function C) a drug that destroys the central vacuole D) a drug that blocks gene expression in circular chromosomes
Which of these structures is NOT formed during gastrulation?
a. Blastocoel b. Archenteron c. Endoderm d. Mesoderm e. Ectoderm