________ is a type of chronic obstructive pulmonary disorder, or COPD.
a. Pneumonia
b. Apnea
c. Bronchitis
d. Lung cancer
e. Emphysema
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________ technology can be used to simultaneously monitor the level of expression of every gene in a cell.
What will be an ideal response?
During DNA replication, DNA ligase is most active on the lagging strand. Why?
a. The lagging strands contain more short DNA segments than the leading strand, and these short segments are joined together by DNA ligase. b. The lagging strand is synthesized more slowly, and DNA ligase speeds up the DNA polymerase. c. The lagging strand synthesizes DNA in the 3' ? 5' direction. d. The lagging strand requires DNA ligase to couple the RNA primer to the Okazaki fragments. e. The lagging strand has no RNA primase activity; it is replaced by DNA ligase.
Which of the following does not provide molecular evidence for evolution?
A) The 1,000-fold differences in nonsynonymous substitutions between some genes B) The existence of pseudogenes C) The fact that high-expression genes use amino acids that are less energetically costly than those used by low-expression genes D) The fact that there is a lower rate of nucleotide substitutions in coding regions than in noncoding regions of genes E) All these are molecular evidence for evolution
In bacteria, a unique RNA that binds the A site of the ribosome and directs the addition of approximately 12 amino acids to the nascent peptide when no stop codon is present is called the ________
Fill in the blank with correct word.