DNA Structure And Genetics – Summary

Question 1

DNA is made up of units called N______?

Answer 1

Nucleotides

Question 2

The 3 parts of a nucleotide are ______, ______ and one of four nitrogen-rich bases.

Answer 2

Phosphate, Deoxyribose sugar and one of four bases, which are adenine, thymine, cytosine, guanine

Question 3

DNA has the shape of a what?

Answer 3

Double helix

Question 4

The bases which pair up are:

A______+T______
C______+G______

Answer 4

Adenine + Thymine

Cytosine + Guanine

Question 5

The bases link up to form the r____ of a twisted l_____.

Answer 5

Rungs; ladder

Question 6

The linking of bases is said to be c____________.

Answer 6

Complementary

Question 7

The chromosomes are found in the n______.

Answer 7

Nucleus

Question 8

Humans have how many chromosomes that occur in matched pairs?

Answer 8

46

Question 9

TRUE or FALSE? Genes are sections of DNA.

Answer 9

True.

Question 10

What is the difference between one gene and the next?

Answer 10

The order of the bases along the DNA strand.

Question 11

The order of the bases is called the g______ code.

Answer 11

Genetic code.

Question 12

What do the letters DNA stand for?

Answer 12

Deoxyribonucleic acid