Chapter 3 Quiz 1

A template strand of DNA is read in the _____ direction in order to direct synthesis of RNA in the _____ direction. (A)5'-3'; 5'-3' (B)3'-5'; 3'-5' (C)5'-3'; 3'-5' (D)3'-5'; 5'-3'

(D)3'-5'; 5'-3'

In the DNA sequence 5'-TGAC-3', the phosphodiester linkage between the guanine and the adenine connects: (A)the 5' end of the guanine to the 2' end of the adenine. (B)the 5' end of the guanine to the 1' end of the adenine. (C)the 3' end of the adenine to the 5' end of the guanine. (D)the 3' end of the guanine to the 5' end of the adenine. (E)the 2' end of the adenine to the 3' end of the guanine.

(D)the 3' end of the guanine to the 5' end of the adenine.

If a DNA molecule is visualized as a wood screw from a hardware store, the threads in the screw would be spaced identical distances from each other. (A)False (B)True

(A)False

Transcription continues until: (A)a terminator sequence is encountered. (B)a ribosome pulls RNA polymerase off the DNA. (C)a transcription factor signals the end of the gene. (D)all bases in the DNA are copied. (E)a stop codon is encountered.

(A)a terminator sequence is encountered.

During transcription of a given protein-coding gene, both strands are used as template. (A)True (B)False

(B)False

The strands in a DNA molecule are: (Select all that apply.) (A)perpendicular. (B)antiparallel. (C)covalently bonded to each other. (D)identical. (E)complementary.

(B)antiparallel. (E)complementary.

An organism's genomic DNA is analyzed and found to contain 22% thymine. What percentage of that organism's DNA is guanine? (A)56% (B)44% (C)22% (D)78% (D)28%

(D)28%