DNA & Protein Synthesis

Which best describes the role of free floating nucleotides (A, C, G, & T) in the illustration?

• They are recycled when the DNA is composed. 
• They are molecular machines the tare used to read ATP. 
• They are enzymes that are produced when the DNA is read. 
• They are the building blocks that are used to make new strands.

Which type of bond, denoted by the arrows, allows DNA to be readily replicated?

• ionic bond
• peptide bond
• covalent bond
• hydrogen bond

Which explains how the second strand of DNA compares with the first strand of DNA?

• The second is a complement of the first strand.
• The second has more nucleotides than the first strand.
• The second strand is a double helix, and the first strand is a double helix. 
• The second strand is coded to produce a different protein than the first strand. 

During replication, the DNA template was exposed to show the sequence ACG. How will the complementary strand be arranged? 

• ACG
• CAT
• GTA
• TGC

What are the primary components of a nucleotide? 

• base, phosphate, and sugar
• acid, base, and phosphate 
• base, oxygen, and phosphate
• acid, chlorine, and hydrogen

Which nucleotide is complementary to adenine?

• adenine
• cytosine
• guanine
• thymine

What is the complementary base to cytosine in DNA?

• uracil
• thymine
• guanine
• adenine 

Which best describes the shape of a DNA molecule? 

• single helix 
• double helix
• single strand
• t-shaped strand

What statement best describes the role of DNA in protein synthesis? 

• DNA carries the amino acid to the ribosomes. 
• DNA forms the structural parts of the ribosomes.
• DNA joins the chains of amino acids to form a protein. 
• DNA contains the information for building individual proteins. 

Tags

NGSS.HS-LS1-1

The DNA sequence ACTCG produces which mRNA sequence during transcription? 

• TGAGC
• UGAGC
• ACTCG
• ACUCG