In the nematode C. elegans, ced-9 prevents apoptosis in a normal cell in which of the following ways?
A) It prevents the caspase activity of ced-3 and ced-4.
B) Ced-9 remains inactive until it is signaled by ced-3 and other caspases.
C) Ced-9 cleaves to produce ced-3 and ced-4.
D) Ced-9 prevents blebbing by its action on the cell membrane.
A
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Nucleotides are joined together to make a nucleic acid strand by ____ bonds
a. phosphodiester
b. disulfide c. glycosidic d. hydrogen e. peptide
The smallest certifiable living organism is a
A. bacterium called Mycoplasma. B. virus. C. nanobe. D. protozoan called Giardia. E. All of the answer choices are correct.
Which of these is not true of the citric acid cycle?
a. The citric acid cycle includes the prep reaction. b. The citric acid cycle produces ATP by substrate-level ATP synthesis. c. The citric acid cycle occurs in the mitochondria. d. The citric acid cycle produces two ATP per glucose molecule.
Digestion of microorganisms occurs in phagosomes
Indicate whether the statement is true or false