Pre-AP Biology Unit 4: Genetics

Chargaff observed a 1:1 ratio between _____ and Thymine (T) in DNA.

• Adenine (A)

• Guanine (G)

• Cytosine (C)

• Thymine (T)

Chargaff observed a 1:1 ratio between _____ and Cytosine (C) in DNA.

• Adenine (A)

• Guanine (G)

• Cytosine (C)

• Thymine (T)

_________ is the genetic material found in all living organisms.

• DNA

• Protein

• Lipids

• Carbohydrates

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1

What are the three components of a nucleotide?

• Sugar, phosphate, nitrogenous base, hydrogen

• Sugar, phosphate, nitrogenous base, sulfur

• Sugar, phosphate, nitrogenous base, oxygen

• Sugar, phosphate, nitrogenous base, carbon

Who accurately described the structure of DNA in 1953?

• Francis Crick and Rosalind Franklin

• James Watson and Francis Crick

• Rosalind Franklin

• James Watson and Rosalind Franklin

What is the primary enzyme responsible for synthesizing new DNA strands during replication?

• Topoisomerase

• RNA primase

• DNA polymerase

• DNA helicase

Which strand of DNA replication is synthesized continuously?

• Template strand

• Lagging strand

• Leading strand

• Complementary strand

What is the function of DNA ligase in DNA replication?

• Unzips the DNA

• Removes RNA primers

• Staples the DNA fragments together

• Synthesizes new DNA strands

What is the sugar present in RNA nucleotides?

• Fructose

• Ribose

• Deoxyribose

• Glucose

What is the term for the process by which a cell copies its DNA?

• Mutation

• Replication

• Translation

• Transcription