2b.2-Video (Biology)

What is the primary structural component of a chromosome?

• Ribosomes

• RNA molecules

• Histone proteins

• Nucleotides

How are genes related to chromosomes?

• Genes are the entire chromosome.

• Genes are regions on chromosomes that code for proteins.

• Genes are separate from chromosomes.

• Genes are only found in the cytoplasm.

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

What is necessary for gene expression to occur?

• Histones must be absent.

• DNA must be tightly packaged.

• RNA polymerase must be inactive.

• DNA must be loosely packaged as chromatin.

What is the role of RNA polymerase in gene expression?

• It packages DNA tightly.

• It translates mRNA into proteins.

• It binds to DNA and transcribes it into mRNA.

• It modifies histones.

How does DNA methylation affect gene expression?

• It directly changes the DNA sequence.

• It loosens DNA packaging, enhancing gene expression.

• It adds a positive charge to histones, tightening DNA packaging.

• It removes histones from DNA.

Tags

NGSS.HS-LS3-2