Test: DNA & Protein Synthesis

Which of the following most accurately describes the structure of a nucleotide?

• amino acid, sugar, base

• phosphate group, sugar, carbohydrate

• sugar, phosphate group, base

• protein, phosphate group, base

Chargaff’s Rules states that in DNA

• A = T and U = C

• A = T and C = G

• A = G and C = T

• U = T and G = C

A sequence of nucleotides found in the DNA of a chromosome codes for a specific protein or trait. This section of DNA is known as a(n)

• allele

• gene

• codon

• mRNA

RNA from a chipmunk is compared to RNA from a worm. Both will contain

• the sugar deoxyribose and the base thymine

• the sugar ribose and the base thymine

• the sugar deoxyribose and the base uracil

• the sugar ribose and the base uracil

Which of the following nucleic acids contains thymine?

• DNA

• tRNA

• mRNA

• All of these

Which of the following is/are true about DNA replication?

• it must occur before a cell can divide

• two complementary strands are duplicated

• the double strand unwinds and unzips while it is being duplicated

• All of these are true

During DNA replication, a complementary strand of DNA is made for each original DNA strand. If a portion of the original strand is CCTAGCT, then the new strand is

• TTGCATG

• CCTAGCT

• AAGTATC

• GGATCGA

The structure of DNA is

• simple

• a single strand

• a double helix

• a long chain of proteins

RNA differs from DNA in that RNA

• is single stranded

• has a different sugar molecule

• contains uracil

• all of these

Molecules of DNA are made of long chains of

• amino acids

• monosaccharides

• fatty acids

• nucleotides