DNA and RNA Strands

In a molecule of double-stranded DNA, the amount of Adenine present is always equal to the amount of

• cytosine

• guanine

• thymine

• uracil

Sometimes, DNA is called "semi-conservative." Why might this be?

• The old strand is "conserved" and used to make the new strands

• Uracil is "conserved" in that it is only used to make the new strands

• ATP is "conserved" via the usage of facilitated diffusion

• Ligase is "conserved" in that it is denatured by the process

Tags

NGSS.HS-LS1-1

A five-carbon sugar found in DNA.

• ribose

• guanine

• deoxyribose

• helicase

Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG

• ATG TGA CAG

• TAC ACT GTC

• GTA AGT GAC

• CAT TCA CTG

Match the letter to the part.

a

b

c

d

e

Hydrogen Bonds

Phosphate

Covalent Bond

Deoxyribose Sugar

Nitrogen Base

Tags

112.42.c.7.A

Which of the following is NOT a part of the DNA nucleotide? 

• Pentose sugar

• Phosphate group

• Nitrogenous base

• Lysine amino acid

What is the goal of DNA replication? (choose the most accurate answer)

• To destroy the DNA molecule

• To make a new copy of DNA from an existing strand of DNA

• To make a totally new DNA molecule from nothing

• To copy the DNA into RNA

DNA is a polymer made of:

• Nucleotides

• Ribosomes

• Purines

• Pyrimidines

Tags

NGSS.HS-LS1-1

Which is the first step?

• DNA Helicase unwinds original DNA strand

• RNA Primase lays down RNA primer for new nucleotide bases.

• DNA polymerase builds new strands by bring in new nucleotide bases.

• Ligase knits together fragments on lagging strand

Which is the second step?

• DNA Helicase unwinds original DNA strand

• RNA Primase lays down RNA primer for new nucleotide bases.

• DNA polymerase builds new strands by bring in new nucleotide bases.

• Ligase knits together fragments on lagging strand