DNA

Question 1

How do the nitrogenous bases pair up?

Answer 1

• The sugar and phosphate groups make the backbone of the DNA molecules.
  -The nitrogenous bases join the two DNA strands together. There
  are four different nitrogenous bases in DNA:
  A – adenine
  T – thymine
  C – cytosine
  G – guanine

Question 1

What are the three parts that make up a nucleotide?

Answer 1

1. A nitrogenous base
2. A sugar (deoxyribose)
3. A phosphate

Question 2

Determine the complementary strand of a DNA sequence.

Answer 2

• A = T
• G = C