The reason why an enzyme fits a specific substrate is due to its 

A. inhibitor.
B. three-dimensional shape.
C. acid side chain.
D. nuclear membrane.


B. three-dimensional shape.

Biology & Microbiology

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Normal human body cells contain how many chromosomes?

a. 22 b. 23 c. 46 d. 44 e. 42

Biology & Microbiology

The cell wall

a. provides physical support for plant cells. b. controls the transport of materials out of the cell. c. replaces the plasma membrane in plant cells. d. is found in all eukaryotes. e. prevents the transport of toxic substances into the plant cells

Biology & Microbiology

Insects have a __________, with many individual

units. Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

What does it mean to "fix" carbon, and during which stage of photosynthesis is carbon fixed?

What will be an ideal response?

Biology & Microbiology