Molecular Genetics

The central dogma of molecular biology can be summed up by

• DNA + RNA = Protein.

• DNA to RNA to Protein.

• RNA to DNA to Protein.

• RNA + DNA = Protein.

Tags

NGSS.HS-LS1-1

Scientists who first determined that DNA is the genetic material were led by

• Oswald Avery.

• Erwin Chargaff.

• James Watson.

• Francis Crick.

The two polynucleotide chains of DNA are held together by bonds between

• amino acids.

• sugars and phosphates.

• complementary bases.

• adenine and uracil.

DNA replication results in

• two DNA molecules that are identical to the original DNA molecule.

• one mRNA molecule that is complementary to the DNA molecule.

• one chain of amino acids that is complementary to the DNA molecule.

How does RNA differ from DNA?

• RNA contains the sugar deoxyribose instead of ribose.

• RNA contains the nitrogen base thymine instead of uracil.

• RNA consists of one nucleotide chain instead of two.

The first step of transcription is

• promotion.

• elongation.

• initiation.

• splicing.

The genetic code is

• unique in each species.

• ambiguous.

• uncommon.

• redundant.

Translation involves all of the following types of molecules except

• amino acids.

• mRNA.

• tRNA.

• DNA.

A frameshift mutation is caused by an insertion or

• deletion.

• translocation.

• inversion.

• diversion.

Tags

NGSS.HS-LS3-2

Which of the following terms is most closely associated with a tRNA molecule?

• codon

• anticodon

• transcription

• ribosome