The nitrogenous base that is only found in DNA and not in RNA is:
A. cytosine.
B. uracil.
C. adenine.
D. thymine.
E. guanine.
D. thymine.
Biology & Microbiology
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The Casparian strip is:
A. a layer of endodermal cells B. a layer of epidermal cells C. the apoplast D. the symplast E. the waxy layer between endodermal cells
Biology & Microbiology
Tight junctions contain ____.
A. occludins and claudins B. occludins and connexins C. cadherins and integrins D. claudins and integrins E. cadherins and claudins
Biology & Microbiology
What are the parts of the enzyme molecule that interact with a substrate called?
a. cofactors b. active sites c. reaction sites d. enzyme product sites e. enzyme-substrate complexes
Biology & Microbiology
Recombination will always alter a cell's genotype
Indicate whether the statement is true or false
Biology & Microbiology