Question

1.

Double-ringed bases are ________.

purines

exempt from Chargaff's Rules

complementary with each other

pyrimidines

2.
Which of the following is not a characteristic of Chargaff’s Rule #1?

is also termed Chargaff's ratio

states that T = A and G = C

states that DNA composition varies among species

states that the ratio of adenine to thymine is equal, as is the ratio of guanine to cytosine

3.
What type of bonds are formed between complementary bases?

triple carbon to carbon bonds

hydrogen bonds

ionic bonds

polar covalent bonds


4.
_______ are single-ringed bases.

guanines

adenines

purines

pyrimidines

Answer 1

1. Purines

2. States that DNA composition varies among species

3. Hydrogen Bond

4. Purines

Answer to #2 is a little iffy -- sorry

Step-by-step explanation:

Pyrmidines have two rings

Purines have one ring

Complementary bases are connected by hydrogen bonds.