biology 2, test 4

Question 1

Gene Expression

Answer 1

The process by which DNA directs the synthesis of proteins

Question 2

The process of protein synthesis in a nutshell

Answer 2

DNA—-> transciption —–> RNA——> translation—–> protein

Question 3

Proteins two important functions

Answer 3

structureally, enzymatic

Question 4

chains of amino acids are called

Answer 4

polupeptide chains

Question 5

Protein synthesis’s flexibility and preciseness is an example of

Answer 5

intelligent design

Question 6

nucleptides are made of

Answer 6

phosphate, sugar, nitrogenous bases

Question 7

the four bases form a genetic____

Answer 7

alphabet

Question 8

codons code for a particular___

Answer 8

amino acid

Question 9

How RNA differs from DNA

Answer 9

1. RNA is single stranded, DNA has a double helix
2. Uricel instead of thymine
3. sugar is ribose not dioxyribose

Question 10

mRNA Structure

Answer 10

single strands made of RNA nucleotides

Question 11

mRNA function

Answer 11

to carry to info from the DNA to the ribosomes

Question 12

rRNA structure

Answer 12

folds up with proteins to form ribosomes

Question 13

rRNA function

Answer 13

synthesizes proteins

Question 14

tRNA structure

Answer 14

T shaped strands of RNA with an anticodon at one end and an amino acid at the other end

Question 15

tRNA function

Answer 15

picks up amino acids in the cell and transfers them to the ribosomes

Question 16

main enzyme

Answer 16

RNA polymerase

Question 17

RIBOSOMES

Answer 17

PROTEIN FACTORY, THE ORGANELLE WHERE SYNTHESIS OF POLYPEPTIDE CHAINS ARE MADE

Question 18

Mutaations

Answer 18

1. any change in DNA

2. could lead to a malformation in a protein that is essential to life

Question 19

silent mutation

Answer 19

a mutation with no negative effects