Proteins are created with:
A. triglycerides.
B. phosphodiester bonds.
C. polysaccharides.
D. peptide bonds.
Answer: D
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Which of the statements best describes the function of telomerase?
A. Telomerase stabilizes the RNA polymerase during bacterial protein transcription. B. Telomerase uses internal RNA as a template for lengthening the DNA single strand and preventing information loss. C. Telomerase is responsible for forming the Okazaki fragments that allow for non-continuous replication. D. Telomerase binds to specific DNA sequences that are not to be replicated and blocks polymerases.
Which of the following is not something that causes guard cells to close?
A. too little water in the leaf B. too much CO2 in the leaf C. presence of abscisic acid D. too little CO2 in the leaf E. too much water vapor outside the leaf
Damage to mutator genes increase the likelihood of cancers because the gene products of the normal genes repair DNA
Indicate whether the statement is true or false
Which of these is a difference between a DNA and an RNA molecule?
a. DNA contains uracil, whereas RNA contains thymine. b. DNA is double-stranded, whereas RNA is single-stranded. c. DNA contains five-carbon sugars, whereas RNA contains six-carbon sugars. d. DNA contains nitrogenous bases, whereas RNA contains phosphate groups. e. DNA is a polymer composed of nucleotides, whereas RNA is a polymer composed of nucleic acids.