What is the function of the poly-A tail?
a. Ending the transcription process
b. Protecting the pre-mRNA from degradation
c. Joining together the exons
d. Removing introns so that functional proteins can be encoded
b. Protecting the pre-mRNA from degradation
The poly-A tail, a string of approximately 200 adenine residues, protects the pre-mRNA molecule from degradation. It’s added by an enzyme to the 3’ end of pre-mRNA strands.
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Which human trait shows a continuous variation?
a. Cystic fibrosis b. Marfan syndrome c. Eye color d. Blood type e. Sickle cell anemia
Carbon dioxide and water can combine to form glucose, water and oxygen. What is required for that process to occur?
A. Nothing, this is a spontaneous reaction. B. light energy from the sun C. energy from the process of cellular respiration D. mitochondria
All of the following are outward signs of inflammation EXCEPT
A. redness. B. pain. C. swelling. D. lower temperature.
Which statement is true about the exchange of gases during respiration?
a. Oxygen diffuses from the cell into the interstitial fluid b. Carbon dioxide diffuses from the interstitial fluid into the cell. c. All of these statements are true. d. Oxygen diffuses from interstitial fluid into the cell. e. Carbon dioxide diffuses from one cell to another cell.