A molecule that consists only of carbon and hydrogen atoms is called a _______________.
A. hydrocarbon
B. nucleic acid
C. sugar
D. starch
E. carbon
Answer: A
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The major advantage of using artificial chromosomes such as bacterial artificial chromosomes (BACs) for cloning genes is that _____
A) plasmids are unable to replicate in cells B) only one copy of a plasmid can be present in any given cell, whereas many copies of a BAC can coexist in a single cell C) BACs can carry much larger DNA fragments than ordinary plasmids can D) BACs can be used to express proteins encoded by inserted genes, but plasmids cannot E) BACs are double-stranded, whereas plasmids are single-stranded
What could be a possible consequence if a structural gene's TATA box is mutated?
A. The transcriptional start site may not function properly. B. Transcription may start at a variety of sites. C. Unusable transcripts may be produced. D. The preinitiation complex may form at the wrong site. E. All of the choices are correct.
Which event occurs during the elongation stage?
a. Peptide bonds form. b. Free amino acids bind to the mRNA binding site. c. Anticodons bind to complementary codons. d. A STOP codon enters the ribosome. e. Peptide bonds form, and anticodons bind to complementary codons.
Fertilization resulting in three or more complete haploid chromosome sets is ____
a. monosomy b. trisomy c. haploid d. diploid e. polyploidy