The semi-fluid matrix that surrounds organelles in a cell is called the: 

A. stroma.
B. nucleoplasm.
C. ribosome.
D. cytoplasm.


D. cytoplasm.

Biology & Microbiology

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Insulin directly affects the

a. secretion of saliva. b. storage of proteins. c. secretion of pancreatic juices. d. metabolism of glucose. e. utilization of fat reserves

Biology & Microbiology

A given section of DNA with the sequence AATGGCTAT is transcribed. What is the corresponding sequence on the complementary DNA strand?

a) UUACCGAUA b) UUGAACGUA c) GGTAACTGT d) TTACCGATA e) CCGTTAGCT

Biology & Microbiology

Which of the following STDs can infect the nervous system?

A) gonorrhea B) syphilis C) chlamydia D) HPV infection

Biology & Microbiology

process of swallowing

What will be an ideal response?

Biology & Microbiology