Proteins that bind to acetylated lysine residues in the histone tail contain:
A. bromodomains.
B. DNA-binding domains.
C. chromodomains.
D. kinase domains.
E. histone-fold motifs.
A
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Which of the following are characteristics of hydrogenosomes that distinguish them from mitochondria?
A. The inner membrane of hydrogenosomes is not highly folded. B. Hydrogenosomes have no DNA. C. Hydrogenosomes generate ATP by fermentation. D. All of the choices are correct.
A heartbeat begins in the
A. atrioventricular valve. B. atrioventricular node. C. sinoatrial node. D. right ventricle. E. left atrium.
What is the difference between pollination and fertilization?
A. Pollination is the movement of pollen from the male region of a plant to the female region. Fertilization is the union of a sperm and egg. B. Pollination is the movement of pollen from the female region of a plant to the male region. Fertilization is the union of a sperm and egg. C. Pollination is the same as fertilization. D. Fertilization is the movement of pollen from the male region of a plant to the female region. Pollination is the union of a sperm and egg.
Which of the following is/are true of capsules?
A. They prevent entry of many bacterial viruses. B. They retain water and help prevent desiccation of the bacteria. C. They help bacteria escape phagocytosis by host cells. D. All of the choices are correct.