DNA and its role in heredity

Question 1

—– are the building blocks of DNA

Answer 1

Nucleotides

Question 2

Nucleic acids are classified according to the pentose they contain. If the pentose is —– the nucleic acid is RNA. If the pentose is —- then it is DNA

Answer 2

Ribose, deoxyribose

Question 3

List the 5 nucleosides

Answer 3

Adenine
Guanine
Cytosine
Uracil
Thymine

Question 4

The backbone of DNA is composed of

Answer 4

alternating sugar and phosphate groups

Question 5

What is the bond between nucleotides called?

Answer 5

Phosphodiester bonds

Question 6

Describe a phosphodiester bond

Answer 6

A phosphate group links the 3’ carbon of one sugar to the 5’ phosphate group of the next incoming sugar ion the chain

Question 7

There are 2 families of nitrogen-containing bases found in nucleotides:

Answer 7

purines and pyrimidine

Question 8

State the structure of purines
Give examples of purines
Which molecules can they be found in

Answer 8

Purines contain 2 rings in their structure
Adenine and guanine
Both are found in RNA and DNA

Georgia Pears (GA pure)

Question 9

State the structure of pyrimidines
Give examples of pyrimidines
Which molecules can they be found in

Answer 9

Pyrimidines have only 1 ring in their structure
Cytosine, Thymine, Uracil
Cytosine- both DNA and RNA
Thymine- only DNA
Uracil- only RNA

CUT PYE