Question

1. based on the question 3, the complementary strand of dna would have the sequences

a. a c t
b. c a a
c. c a g
d. g t c

1. soon after the discovery of the double-helix model, researchers began examining the similarities between dna and rna. one similarity they found was that rna and dna

a. contains the bases adenine, uracil, guanine, cytosine.
b. is found exclusively in the nucleus.
c. contains a phosphate group, sugar, and nitrogenous base.
d. contain the bases adenine, thymine, guanine, cytosine.

1. patients taking another drug meant to prevent kidney failure found that they had elevated levels of amino acids in their urine. which of the following accurately describes the role of amino acids in the body?

a. amino acids are necessary for protein synthesis because they are the building block monomers of protein molecules.
b. amino acids are required for the proper formation of cell membranes and serve to build connective tissue between cells.
c. amino acids are necessary for the synthesis of nitrogenous bases in dna and rna molecules.
d. amino acids are required during cellular respiration in the formation of atp from glucose molecules.

1. the image below shows a molecule of dna and a molecule of mrna.

Explanation:

1. DNA complementary base pairing rules are A-T and C-G. For the template strand CAA (from implied question 3 logic), the complementary strand is GTC.
2. DNA and RNA both have a phosphate group, pentose sugar, and nitrogenous bases; DNA has thymine, RNA has uracil, RNA is not only in the nucleus, so option c is correct.
3. Amino acids are the monomer units that polymerize to form proteins, which matches option a. The other options describe incorrect functions of amino acids.

Answer:

1. d. GTC
2. c. contains a phosphate group, sugar, and nitrogenous base.
3. a. Amino acids are necessary for protein synthesis because they are the building block monomers of protein molecules.