Science Test

Question 1

What are 3 parts of a nucleotide

Answer 1

sugar, base, phosphate

Question 2

Draw a nucleotide with all 3 parts

Question 3

What does it mean that DNA is antiparallel?

Answer 3

it goes in opposite directions

Question 4

What is the shape of DNA?

Answer 4

Double helix

Question 5

What parts of the nucleotide are in the “backbone” of the molecule?

Answer 5

phosphate and sugar

Question 6

What part of the nucleotide make up the “rungs” or middle part of the molecule?

Answer 6

base

Question 7

Draw 2 nucleotides that are antiparallel

Answer 7

upside down

Question 8

What are the 4 nitrogenous bases of DNA and what bases bind to each other?

Answer 8

A-T, C-G

Question 9

If one strand of DNA had a sequence of T G C C G A T T C. What is the other strand of DNA?

Answer 9

T, A, C, G, G, C, T, A, A, T, G

Question 10

What is a chromosome?

Answer 10

structure to hold DNA

Question 11

What is a gene?

Answer 11

Part of DNA to codes for protein
Basic unit of heredity

Question 12

What are some SPECIFIC functions of proteins?

Answer 12

muscle, contractions, digestion, cell functions

Question 13

What is the genome?

Answer 13

All DNA incell

Question 14

How many chromosomes does a human have? How many PAIRS of chromosomes do humans have?

Answer 14

46
23 pairs

Question 15

What occurs if a person has more than the appropriate amount of chromosomes?

Answer 15

Disease could lead to death

Question 16

What is a gene?

Answer 16

The basic unit of heredity. Part of

Question 17

How many genes does a human have?

Answer 17

20,000 - 25,000

Question 18

What do genes code for?

Answer 18

proteins

Question 19

What is DNA made of?

Answer 19

Nucleotides: Phosphate, sugar, and base

Question 20

What happens if the DNA is changed?

Answer 20

mutants, person can change, diseases