05.DNA & Protein Synthesis

What do A, B, and C represent (in that order)?

• phosphate group, pentose sugar, nitrogen base

• pentose sugar, nitrogen base, phosphate group

• nitrogen base, phosphate group, pentose sugar

• phosphate group, nitrogen base, pentose sugar

The sugar in a DNA nucleotide is ___ while RNA uses ___.

• ribose, deoxyribose

• glucose, pentose

• pentose, ribose

• deoxyribose, ribose

Which nitrogen base is found only in RNA?

• thymine

• uracil

• cytosine

• guanine

Which represents correct DNA base pairing?

• C-G and A-T

• C-T and A-G

• C-G and A-U

• T-U and G-C

What makes up the backbone of DNA?

• nitrogen bases

• sugar and phosphate

• hydrogen bonds

• entire nucleotide

What holds the nitrogen bases together in the center of the DNA double helix?

• nitrogen bonds

• nucleic bonds

• peptide bonds

• hydrogen bonds

Why is the sequence of nitrogen bases in DNA important?

• It determines the sequence of amino acids in a protein.

• Different sequences code for different versions of traits.

• It contains genetic information; instructions for traits.

• All other answer choices are correct.

Scientists can combine DNA from two different species because:

• All species have the same genetic code.

• All species have the same nucleotide sequence.

• All species use the same DNA building blocks (nucleotides).

• All species have the same versions of each gene.

Where does transcription occur in a cell?

• Nucleus

• Ribosomes

• Nucleolus

• Cytoplasm

Where does translation occur in a cell?

• Nucleus

• Golgi

• Ribosomes

• Mitochondria