Molecular Genetics

The monomers of DNA and RNA are

• nucleic acids

• fatty acids

• nucleotides

• monosaccharides

Which statement regarding DNA is false?

• DNA molecules have a sugar-phosphate backbone

• DNA contains the nitrogenous base uracil

• One DNA molecule can include four different nucleotides in its structure

• DNA contains the sugar deoxyribose

Which statement regarding RNA is false?

• One RNA molecule can include four different nucleotides in its structure.

• RNA molecules have a sugar-phosphate backbone.

• RNA contains the sugar dextrose

• RNA contains the nitrogenous base uracil

The shape of a DNA molecule is most like

• beads on a string

• a wooden ladder

• a twisted rope ladder

• a set of railroad tracks

DNA replication

• begins when two DNA molecules join together to exchange segments

• results in the formation of four new DNA strands

• uses each strand of a DNA molecule as a template for the creation of a new strand

• occurs through the addition of nucleotides to the end of the parental DNA molecule

Tags

NGSS.HS-LS3-2

Which enzyme catalyzes the elongation of a new DNA strand?

• DNA ligase

• reverse transcriptase

• DNA polymerase

• RNA polymerase

Which option best depicts the flow of information when a gene directs the synthesis of a cellular component?

• DNA--> RNA--> protein

• RNA--> DNA--> RNA--> protein

• protein --> RNA --> DNA

• DNA-->tRNA-->mRNA--> protein

Tags

NGSS.HS-LS1-1

The "one gene-one enzyme" hypothesis states that

• the synthesis of each enzyme is catalyzed by one specific gene.

• the function of an individual gene is to dictate the production of a specific polypeptide.

• the function of each polypeptide is to regulate the synthesis of each corresponding gene.

• the synthesis of each gene is catalyzed by one specific enzyme

Tags

NGSS.HS-LS1-1

In the genetic code

• some codons specify more than one amino acid

• many amino acids are specified by more than one codon

• some codons consist of two nucleotides

• some amino acids are not specified by any codons

Which process takes place during translation?

• the conversion of genetic information from DNA nucleotides into RNA nucleotides

• the conversion of genetic information from the language of proteins to the language of enzymes

• the conversion of genetic information from the language of nucleic acids to the language of proteins