Question

1. which of the following are true statements regarding the relationship among dna, genes, and chromosomes? select all that apply.

a dna is a location on a gene.
b genes are made up of chromosomes and proteins.
c genes are found on chromosomes.
d chromosomes are found on dna.
e chromosomes are made up of dna and proteins.

1. which statement best describes the function of dna in all cells?

a dna serves to block all mutations in a cell.
b dna carries its information to the cytoplasm for exocytosis.
c dna directs the synthesis of proteins for the cell.
d dna acts as a chemical messenger for the cell.
maap-eoc biology i
141
section 4.1
molecular genetics

Explanation:

For Question 4:

• Option A is incorrect: Genes are specific segments/locations on DNA, not the other way around.
• Option B is incorrect: Chromosomes are made of DNA and proteins; genes are segments of DNA.
• Option C is correct: Genes are located within the DNA that makes up chromosomes.
• Option D is correct: Chromosomes are structures composed of DNA wrapped around proteins.
• Option E is correct: Chromosomes consist of DNA (which contains genes) and associated proteins.

For Question 5:

• Option A is incorrect: DNA does not block mutations; it can accumulate mutations, and cells have separate repair mechanisms.
• Option B is incorrect: DNA stays in the nucleus (in eukaryotes); mRNA carries information to the cytoplasm for protein synthesis, not DNA itself for exocytosis.
• Option C is correct: The core function of DNA is to store genetic information that directs the synthesis of proteins, which carry out most cellular functions.
• Option D is incorrect: mRNA acts as the chemical messenger between DNA and ribosomes; DNA does not serve this role.

Answer:

Question 4:

C. Genes are found on chromosomes.
D. Chromosomes are found on DNA.
E. Chromosomes are made up of DNA and proteins.

Question 5:

C. DNA directs the synthesis of proteins for the cell.