Chapter 2 Lesson 3 DNA and Genetics

RNA is different from DNA because it contains ______ instead of thymine.

• A) Adenine

• B) Guanine

• C) Cytosine

• D) Uracil

Transcription is the process of creating RNA from a DNA template. True or False?

• True

• False

What allows more genes to fit in a small space within chromosomes?

• Loose arrangement of DNA strands

• Tightly coiled DNA strands

• Random arrangement of proteins

• Large size of chromosomes

Francis Crick was of which nationality?

• American

• British

• French

• Italian

The structure of DNA is often described as a twisted ________.

• Zipper

• Rope

• Chain

• Wire

James Watson and Francis Crick built the first model of DNA using ________.

• X-rays and chemical information

• Microscopes and chemical reactions

• Computer simulations and experiments

• Historical texts and diagrams

The twisted ladder shape of DNA is also known as a ________.

• Double helix

• Single strand

• Triple helix

• Quadruple helix

The structure shown in the image is a representation of ______.

• RNA

• DNA

• Protein

• Lipid

Which of the following is a characteristic of DNA?

• Single-stranded

• Double-stranded

• Triple-stranded

• Quadruple-stranded

Adenine always bonds with which base in DNA?

• Cytosine

• Thymine

• Guanine

• Adenine