What do muscarine and nicotine have in common?
A. They are both antagonists for their respective receptors.
B. They are both agonists for their respective receptors.
C. They both activate-protein coupled channels.
D. They have nothing in common.
Which of the following is NOT a difference between DNA and RNA?
A.They have different sugars.
B.RNA is a single strand, while DNA is a double strand.
C.DNA has thymine, while RNA has uracil.
D.They both can leave the nucleus to perform their functions.
Pre-mRNA contains noncoding regions called
C. small nuclear ribonucleoproteins (snRNPs).