DNA & Protein Synthesis

What is the structure of DNA called?

• double helix

• single strand

• beta sheet

• alpha helix

What are the four different bases found in DNA?

• adenine, thymine, cytosine, guanine

• adenine, uracil, cytosine, guanine

• adenine, thymine, cytosine, uracil

• adenine, guanine, cytosine, tryptophan

The repeating units consisting of one deoxyribose sugar, one phosphate, and one nitrogen base are called ________.

• nucleotides

• polysaccharides

• amino acids

• fatty acids

Which of the following is NOT a base found in DNA?

• Adenine

• Thymine

• Uracil

• Guanine

According to the DNA structure, which base always pairs with Adenine (A)?

• Guanine (G)

• Thymine (T)

• Cytosine (C)

• Adenine (A)

Tags

NGSS.HS-LS1-1

In DNA, Cytosine (C) always pairs with _______.

• Guanine (G)

• Adenine (A)

• Thymine (T)

• Uracil (U)

The two DNA strands are said to be ________ because they run in opposite directions.

• anti-parallel

• co-parallel

• perpendicular

• parallel

Match the scientist to their contribution:

• Built 3D models of DNA using x-ray data

• James Watson and Francis Crick

• Showed DNA strands are twisted in a helix

• Erwin Chargaff

• Discovered equal ratios of A:T and C:G

• Rosalind Franklin

Tags

NGSS.HS-LS1-1

What is the process during which the DNA is copied during cell division called?

• DNA Replication

• Transcription

• Translation

• Mutation

Step 1 of DNA replication involves DNA untwisting and which enzyme 'unzipping' the bases by breaking the hydrogen bonds between them?

• Helicase

• Ligase

• Polymerase

• Primase