What is the function of the 3' poly-A sequence in eukaryotic mRNA?
a. It provides an intron splicing signal.
b. It provides protection from cytosolic enzymes.
c . It helps with translation termination.
d. It is the initial attachment site for ribosomes.
Ans: b. It provides protection from cytosolic enzymes.
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In analyzing the number of different bases in a DNA sample, which result would be consistent with the base-pairing rules?
A) A = G B) A + G = C + T C) A + T = G + T D) A = C E) G = T
________ bonds are responsible for the chemical affinity between A and T (or G and C) nucleotides.
A) Ionic B) Covalent C) Hydrogen D) Hydrophobic
Chlamydia trachomatis causes
A. nongonococcal urethritis in males. B. cervicitis in females. C. pelvic inflammatory disease in females. D. congenital conjunctivitis. E. All of the choices are correct.
The DNA sequence below encodes the first five amino acids of a large protein. 5? ATGTTAGGATATCAG 3? 3? TACAATCCTATAGTC 5? a. Identify the coding and template strands. b
Write the sequence and polarity of the mRNA transcript produced by this sequence. Where does this process occur in eukaryotes? c. Write the amino acid sequence of the amino acids produced using the three-letter code for amino acids. (See genetic code table in text.) Where does this process occur in eukaryotes?