A base-pair substitution may alter a protein by changing an amino acid or by introducing a(n) _____________________.

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


premature stop codon; amino acid substitution

Biology & Microbiology

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Then end of which phase coincides with ovulation?

a. menstrual b. progestational c. proliferative d. endometrial e. pregnancy

Biology & Microbiology

What are some challenges land plants face compared to life in the water?

A) Obtaining and retaining moisture B) Staying upright against the pull of gravity C) Obtaining resources from air and soil instead of from water D) All of the above are challenges faced by land plants.

Biology & Microbiology

Theoretically, which two of the following present the richest potential sources of silica?

1. marine sediments consisting of foram tests 2. diatomaceous earth 3. marine sediments consisting of radiolarian tests 4. marine sediments consisting of dinoflagellate plates A) 1 and 2 B) 1 and 4 C) 2 and 3 D) 2 and 4 E) 3 and 4

Biology & Microbiology

Converting 1 molecule of glucose to 2 pyruvate molecules generates the net formation of this many ATP during cellular respiration:

A. 6 molecules of water B. 3 molecules of ATP C. 2 molecules of ATP D. 72 - 76 molecules of ATP E. 36 - 38 molecules of water

Biology & Microbiology