In a population of organisms, beneficial and harmful random mutations are retained or eliminated through the process of:
A) expression
B) folding
C) selection
D) translation
E) conservation
Ans: C) selection
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What radiolabeled substance did Hershey and Chase use to label the protein component of the bacteriophage in their study to determine whether protein or DNA was necessary for phage production?
A) nitrogen B) carbon C) sulfur D) phosphorus E) iodine
The following structures are found in all
eukaryotic cells EXCEPT
a. cell walls. b. the nucleus. c. plasma membranes. d. Golgi bodies. e. the endoplasmic reticulum
Mendel accounted for the observation that traits that had disappeared in the F1 generation reappeared in the F2 generation by proposing that _____
A) new mutations were frequently generated in the F2 progeny, "reinventing" traits that had been lost in the F1 B) the mechanism controlling the appearance of traits was different between the F1 and the F2 plants C) traits can be dominant or recessive, and the recessive traits were obscured by the dominant ones in the F1 D) members of the F1 generation had only one allele for each trait, but members of the F2 had two alleles for each trait
What is the causative agent of Farmer's Lung and Bagossis?
A. Actinomyces israelii B. Nocardia C. Mycobacterium tuberculosis D. Bacillus anthracis E. Clostridium perfringens