DNA Unit Test

Why is DNA important?

• it is very small and very complicated

• it's in everything

• it serves as the blueprint for traits of all living things

• because we eat it every day for energy

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

The DNA nucleotide is composed of three parts. Which two components make up the nucleotide backbone?

• ribose sugar and base

• ribose sugar and phosphate group

• nitrogen base and deoxyribose sugar

• deoxyribose sugar and phosphate group
  

What is responsible for holding the two strands of the DNA double helix together?

• hydrogen bonds

• alleles

• London dispersion forces

• deoxyribose sugars

The nucleic acid DNA is composed of

• sugar, protein, and nitrogenous bases.

• protein, nitrogenous bases, and phosphate.

• nitrogenous bases, phosphate, and RNA.

• sugar, phosphate, and nitrogenous bases.

A scientist observes a base sequence of AGCTAGCTAGCT.  Which of the following would be the complimentary strand?

• TGCATGCATGCA

• TCGATCGATCGA

• TAGCTAGCTAGC

• TTAAGGCCTTCC

The enzyme that reconnects the loose nucleotides to unzipped strands of DNA is

• helicase

• replicase

• polymerase

• DNA polymerase

After analyzing a sample of DNA, a scientist recorded the data shown in the table. What percentage of the DNA sample is cytosine?

• 22%

• 25%

• 28%

• 56%

The enzyme that unzips the DNA to prepare for replication

• helicase

• replicase

• polymerase

• synthase

TRANSCRIBE this DNA sequence: TACGTTACT

(hint: to make RNA use RNA bases)

• AUGCAAUGA

• ATGCAATGA

• AUGGATUGA

• TACGTTACT

Which organelle is DNA usually found in?

• cell membrane

• vacuole

• chloroplast

• nucleus

Tags

NGSS.MS-LS1-2