4.1 Study Guide

Question 1

RNA

Answer 1

• Carry out instructions encoded in DNA
• Single stranded
• Ribose
• Adenine
• Cytosine
• Guanine
• Uracil

Question 2

DNA

Answer 2

• Replicates and stores genetic information
• Double helix
• Deoxyribose
• Adenine
• Thymine
• Cytostine
• Guanine

Question 3

DNA Structure

Answer 3

Deoxyribonucleic acid (abbreviated DNA) is the molecule that carries genetic information for the development and functioning of an organism. DNA is made of two linked strands that wind around each other to resemble a twisted ladder — a shape known as a double helix. Consists of a phosphate, sugar, and base. Each molecule of DNA is a double helix formed from two complementary strands of nucleotides held together by hydrogen bonds between G-C and A-T. Antiparallel so 3’ to 5’ and 5’ to 3.

Question 4

Watson and Crick

Answer 4

They discovered that certain bases always pair up in the middle of a DNA strand. “A” pairs with “T” and “G” pairs with “C”.

Question 5

Rosalind Franklin

Answer 5

She discovered the double-helix shape in DNA.