Unit 4 test Quizizz - Concept 1

Which of the following statements is true about DNA structure?

• A bonds with G

• C bonds with T

• A bonds with T

• G bonds with T

Tags

NGSS.HS-LS1-1

In RNA, which base is not present that is found in DNA?

• Uracil (U)

• Thymine (T)

• Cytosine (C)

• Guanine (G)

What type of molecule is RNA primarily composed of?

• Amino acids

• Nucleotides

• Lipids

• Carbohydrates

Which of the following is a characteristic of DNA but not RNA?

• Contains uracil

• Single strand

• Double helix

• Contains ribose

Which nitrogen bases are found in RNA?

• A, T, C, G

• A, U, C, G

• A, T, U, G

• A, C, G, T

What is the main structural difference between DNA and RNA?

• DNA is a single strand, RNA is a double helix

• DNA is a double helix, RNA is a single strand

• Both are double helix

• Both are single strand

What is the relationship between genes and chromosomes?

• Genes are sections of DNA; chromosomes are long strands of DNA

• Genes are long strands of DNA; chromosomes are sections of DNA

• Genes are proteins; chromosomes are RNA

• Genes are RNA; chromosomes are proteins

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

How many pairs of chromosomes do humans have?

• 37 pairs

• 23 pairs

• 46 pairs

• 74 pairs

Tags

NGSS.HS-LS3-1

What is the first step in DNA replication?

• Enzymes bind complementary bases

• Two identical DNA molecules are formed

• Unzip the DNA

• DNA strands are twisted

Which strand is synthesized in short fragments during DNA replication?

• Leading strand

• Lagging strand

• Complementary strand

• Continuous strand