A ________ mutation does not change the amino acid sequence of a protein
A) nonsense B) deletion C) frameshift D) missense E) silent
Answer: E
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Which of the following is true regarding sympatric speciation?
A. Sympatric speciation requires physical separation of two populations. B. Sympatric speciation requires a selective disadvantage of hybrids (e.g., medium-billed birds) of two diverging populations.
Which organelle contains cristae where enzymes and electron carriers for aerobic respiration are found?
A. Lysosome B. Chloroplast C. Mitochondrion D. Golgi apparatus E. Endoplasmic reticulum
The binding between an enzyme and its substrate
a. is weak and temporary. b. consists of strong covalent bonds. c. consists of weak ionic bonds. d. is relatively stable. e. is none of these.
An operon is:
a. a molecule that can turn genes on and off. b. an inducer bound to a repressor. c. a series of regulatory sequences controlling transcription of protein-coding genes. d. any long sequence of DNA. e. a promoter, an operator, and a group of linked structural genes.