Which one of the following explains why rRNAs are the most abundant type of RNA in a mammalian cell?
A. There are more different types of rRNA genes than all other types of genes combined.
B. There are rRNAs in ribosomes, and it takes millions of ribosomes to translate all the proteins required for a cell's functions.
C. A different type of ribosome is needed to synthesize all of a cell's proteins, and because most proteins are present in multiple copies, a huge number of ribosomes are needed.
D. It takes several rRNAs to transcribe a single mRNA, so there are many more rRNAs needed in a cell than the number of proteins synthesized.
E. None of the above; rRNAs are not the most abundant type of RNA in a mammalian cell.
Answer: B
You might also like to view...
What type of species, if removed from the community, could lead to the collapse of the entire community?
A. Invasive species B. Indicator species C. Keystone species D. Flagship species
Life began on Earth as multicellular
a. True b. False Indicate whether the statement is true or false
If a sequence of one strand of DNA is 5´-TGACTATC-3´, what is the complementary strand?
A: 5´-TGACTATC-3´ B: 5´-ACTGATAG-3´ C: 3´-ACTGATAG-5´ D: 3´-ACTGATAG-3´ E: 3´-TGACTATC-5´
Fungi ________.
A. absorb nutrients from the environment B. generate ATP and reducing equivalents by photosynthesis C. take in food by phagocytosis D. All of the choices are correct.