All of the following occur in both DNA and RNA EXCEPT

a. four nitrogenous bases.
b. a phosphate–sugar backbone.
c. a double-stranded molecule.
d. All of these are found in both DNA and RNA


C

Biology & Microbiology

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The multiple genetic and environmental factors affecting complex traits imply that different people can have the same disease for different reasons

A. true B. false

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If protein had been the genetic material, then what would Oswald Avery have observed in his experiments?

1.Bacterial extracts treated with proteinase would transform nonvirulent bacteria into the virulent strain. 2. Bacterial extracts treated with proteinase would not transform nonvirulent bacteria into the virulent strain. 3.Bacterial extracts treated with DNAse would transform nonvirulent bacteria into the virulent strain. 4.Bacterial extracts treated with DNAse would not transform nonvirulent bacteria into the virulent strain. A. Statement 1 B. Statement 2 C. Statements 1 and 3 D. Statements 2 and 3 E. Statements 2 and 4

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In humans, having dimples in the cheeks is a dominant trait. If a child has dimples but only one of her parents does, what are the genotypes of her parents? (D = dimples; d = no dimples)

A. One parent dd, other parent DD B. One parent dd, other parent Dd C. One parent Dd, other parent DD D. One parent must be DD, the other parent could be either dd or Dd E. One parent must be dd, the other parent could be either Dd or DD

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Do all animal samples have similar profiles?

a. Yes b. No

Biology & Microbiology