Chromosomes and DNA

What is the shape of DNA?

• Single helix

• Double helix

• Circular

• Linear

What are alleles?

• Different versions of a gene.

• The physical location of a gene on a chromosome.

• The process of gene expression.

• A type of mutation in DNA.

Where are chromosomes located?

• In the nucleus of a cell.

• In the cytoplasm of a cell.

• In the mitochondria of a cell.

• In the ribosomes of a cell.

The first 22 pairs of chromosomes are called _____________.

• autosomes

• sex chromosomes

• mitochondrial DNA

• chromatids

What is a gene?

• A segment of DNA that contains coding for a protein or peptide sequence.

• A type of RNA that helps in protein synthesis.

• A structure that carries genetic information in the form of chromosomes.

• A molecule that catalyzes biochemical reactions in the body.

What is the difference between DNA and RNA?

• DNA is single-stranded and helps in protein synthesis; RNA is double-stranded and stores genetic information.

• DNA is double-stranded and stores genetic information; RNA is single-stranded and helps in protein synthesis.

• DNA and RNA are both double-stranded and serve the same function in cells.

• DNA is single-stranded and stores genetic information; RNA is double-stranded and helps in protein synthesis.

What is the role of DNA in heredity?

• DNA carries genetic information from parents to offspring.

• DNA is responsible for protein synthesis only.

• DNA helps in the digestion of food.

• DNA has no role in heredity.

Each chromosome is made up of coiled strands of ______.

• RNA

• Protein

• DNA

• Lipids

What are chromosomes?

• Structures within cells that contain DNA.

• Small organelles responsible for energy production.

• Components of the cell membrane that regulate transport.

• Proteins that help in the synthesis of RNA.

What is a centromere?

• The region of a chromosome where the two sister chromatids are joined.

• A part of the cell responsible for energy production.

• The structure that holds the genetic information of an organism.

• The site of protein synthesis in the cell.