When ____ comes in contact with acidic gastric juices, it is converted to ____, the main digestive enzyme of the

stomach.
a. carboxyamylase; amylase
b. amylase; carboxyamylase
c. pepsin; pepsinogen
d. pepsinogen; pepsin
e. bolus; chyme


d

Biology & Microbiology

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In the light-dependent reactions of

photosynthesis, how do hydrogen ions get back into the stroma?

a. passive diffusion directly across the thylakoid membrane b. active transport accross the thylakoid membrane c. facilitated diffusion across the thylakoid membrane d. active transport through ATP synthase e. passive diffusion through ATP synthase

Biology & Microbiology

Carbon-12 has six protons and six neutrons in its nucleus. Carbon-14 has six protons and eight neutrons in its nucleus and is radioactive. Carbon-14 is an example of a(n) ________.

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

Biology & Microbiology

The basic unit of life is the ____

a. atom b. molecule c. organelle d. cell e. organism

Biology & Microbiology

Sexual reproduction

A) results in new combinations of genetic traits. B) requires less tissue differentiation than asexual reproduction. C) produces genetic clones and requires less tissue differentiation than asexual reproduction. D) leads to uniform characteristics in a population. E) produces genetic clones.

Biology & Microbiology