SCIENCE

Question 1

What two nitrogenous bases have two ring structures and are called purines?

Answer 1

adenine and guanine.

Question 2

What two nitrogenous bases have one ring structure and are called pyrimidines?

Answer 2

cytosine and thymine

Question 3

What two structures make up the backbone of the DNA molecule

Answer 3

Phosphate and Sugar

Question 4

What are the three parts of a nucleotide?

Answer 4

phosphate group, nitrogenous base, deoxyribose sugar

Question 5

What is the twisted ladder shape of DNA?

Answer 5

double helix

Question 6

Where is the DNA located within a cell?

Answer 6

in the nucleus or genes

Question 7

What type of bonds hold the base pairs together?

Answer 7

hydrogen bonds

Question 8

One side of the double helix is called the _____

Answer 8

3 prime side

Question 9

The other side of the double helix is called the _____

Answer 9

5 prime side

Question 10

How many meters of DNA are coiled into chromosomes inside the nucleus?

Answer 10

2 meters

Question 11

DNA is….

Answer 11

A molecule. It is like a book of code that tells your cells what to do

Question 12

The building blocks of the molecule are called..

Answer 12

nucleotides

Question 13

nucleotides are composed of…

Answer 13

A phosphate group. A deoxyribose sugar molecule. And one of 4 different nitrogenous bases.

Question 14

The sequence of the base pairs is..

Answer 14

The genetic code

Question 15

In between the ‘backbone’ sides….

Answer 15

there are pairs of nitrogenous bases held together by 2 hydrogen bonds.