The organisms occupying the base of a pyramid of energy are autotrophs
____________________ Indicate whether the statement is true or false.
True
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For most T4 phages, the nucleic acid enters the host cell but the capsid is left outside.
Answer the following statement true (T) or false (F)
Antibodies are
A. specific molecules, or parts of molecules, that the body recognizes as foreign B. cells that protect the body against invaders C. enzymes secreted to destroy a pathogen's cell wall D. proteins the body produces against invading substances E. proteins on the surface of our cells to which pathogens attach
Polar bodies are produced during
a. DNA replication. b. oogenesis. c. mitosis. d. None of these are correct. e. spermatogenesis.
The citric acid cycle is a series of oxidation reactions that removes carbon atoms from substrates in the form of CO2
Once a molecule of acetyl CoA enters the citric acid cycle, how many complete cycles are required for both of the carbon atoms in its acetyl groupto be oxidized to CO2? (a) 1 (b) 2 (c) 3 (d) 4