Why are the components of the electron transport chain embedded in the inner mitochondrial membrane rather than floating freely in the cytoplasm of mitochondrial matrix?
A. To generate and maintain the proton gradient essential for ATP production.
B. To separate the ATP from the ADP.
C. Because electrons cannot float in the matrix.
D. Because NADH cannot localize to the mitochondrial matrix.
A. To generate and maintain the proton gradient essential for ATP production.
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Which of the following is not true of the second step of translational elongation in bacteria?
A. The carboxyl group oxygen of the A-site amino acid is the nucleophile in peptide bond formation. B. A peptide bond is formed between the two amino acids bound by the tRNAs in the A and Psites. C. The growing polypeptide chain is transferred to the tRNA in the A site. D. The ?-amino group of the A-site amino acid attacks the carbonyl carbon of the P-site amino acid.
What fraction of the time will the cross of Aa Bb Cc with Aa Bb Cc produce an offspring of genotype
Aa bb CC? a. 1/64 b. 1/32 c. 3/64 d. 1/16 e. 9/64
What is the name of the process of selecting a specific group of organisms from an initially heterogeneous population for future breeding purposes?
A) natural selection B) diversity selection C) exclusive selection D) artificial selection
Stacks of cisternae in the Golgi apparatus are referred to as ________.
A. golgisomes B. stigmata C. dictyosomes D. Lamellisomes