The terms exon and intron are best associated with 

A. transcription.
B. translation.
C. replication.
D. prokaryotic cells.


A. transcription.

Biology & Microbiology

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The energy currency of a cell is _______

A. ATP B. glucose C. glycogen D. triglycerides E. proteins

Biology & Microbiology

Why is nitrogen fixation by prokaryotes essential to life on Earth?

a. It removes nitrogen from the soil. b. It converts atmospheric nitrogen to a non-toxic form. c. It provides nitrogen sources for plants and animals. d. It provides an energy source for photosynthesis. e. It allows for the breakdown of complex macromolecules.

Biology & Microbiology

The primary difference between different nucleated cells in a developing zygote is

a. the genetic code of each cell. b. the expression of housekeeping genes. c. the expression of a gene or group of genes. d. the number of chromosomes present in the nucleus. e. the presence or absence of gene regulators.

Biology & Microbiology

Which of the following terms describes gene regulation that occurs by rendering a protein non-functional?

a. epigenetic level of regulation b. post-transcriptional level of regulation c. translational level of regulation d. post-translational level of regulation

Biology & Microbiology