DNA and RNA Quiz

After examining the DNA of different organisms, which of the following did Erwin Chargaff conclude about the four bases?

• A = T and C = G
• A = C = G = T
• A = C and G = T
• A + T = C + G

Which of the following DNA sequences is complementary to the base sequence ACCGTAT?

• GTTACGC
• UCCGTAT
• TGGCATA
• CAATGCG

Which of the following is the shape of DNA?

• nucleotide.
• X in a circle.
• double helix.
• covalent bond.

The process of making new DNA molecules is semiconservative. This means that every new DNA molecule is composed of

• two completely identical strands of DNA.
• one original and one new strand of DNA.
• one strand of DNA and one strand of RNA.
• two strands that mix original and new DNA.

The central dogma of molecular biology states that information flows in one direction from

• nuclei to RNA to cytoplasm.
• ribosomes to proteins to DNA.
• genes to nuclei to ribosomes.
• DNA to RNA to proteins.

Tags

NGSS.HS-LS1-1

Choose the nucleotide sequence of the RNA strand that would be complementary to the following DNA strand: GTAGTCA.

• UATUAGA
• ACGACTG
• CAUCAGU
• CATCAGT

The main function of tRNA is to

• carry a message that, when translated, forms proteins.
• form a portion of ribosomes, a cell's protein factories.
• string together complementary RNA and DNA strands.
• bring amino acids from the cytoplasm to the ribosomes.

What is the term for a three-nucleotide sequence of mRNA that codes for an amino acid?

• base
• codon
• amine
• serine

Which phrase best describes translation?

• produces a polypeptide from mRNA instructions
• catalyzes the formation of bonds between amino acids
• produces mRNA complementary to DNA molecules
• recycles tRNA molecules for reuse

Which of the following is the site of translation?

• vacuole
• lysosome
• nucleus
• ribosome