do now from topic 2 and 3

Question 1

what are proteins coded by

Answer 1

genes in DNA

Question 2

gas exchange takes place in lungs by

Answer 2

diffusion

Question 3

name the bond that joins the nucleotides (phosphate sugar, pentose sugar and base)

Answer 3

phosphodiester bond

Question 4

is adenine purine or pyrimidine

Answer 4

purine

Question 5

is cytosine purine or pyrimidine

Answer 5

pyrimidine

Question 6

is guanine purine or pyrimidine

Answer 6

purine

Question 7

is thymine purine or pyrimidine

Answer 7

pyrimidine

Question 8

name 3 components of nucleotides

Answer 8

phsophate groups
base nitrogeous
pentase sugar

Question 9

state the function of polynucleotide

Answer 9

binds 2 mononucleotide to make a polynucleotide

Question 10

true of false
The ribosomes is made of a large and a small subunit

Answer 10

true

Question 11

true of false
The ribosomes is the site of translation

Answer 11

true

Question 12

true of false
The ribosomes is the sight of transcription

Answer 12

false

Question 13

true of false
The ribosomes is only visible under an electron microscope

Answer 13

true

Question 14

true of false
The ribosomes is surrounded by membrane

Answer 14

False

Question 15

purpose of replication of DNA

Answer 15

too long to leave nucleus
so makes new dna for new daughter cells

Question 16

the enzyme that builds a new DNA strand by complementary base pairings

Answer 16

dna polymerase

Question 17

what is biological catalyst

Answer 17

reduces activation energy produced by organisms

Question 18

activation energy

Answer 18

how much energy is needed for reaction to take place by breaking bonds

Question 19

are channel protein only in one side of the protein or across the whole bilayer

Answer 19

one side of the protein

Question 20

why is dna helicase important

Answer 20

unwounds the dna
nucleotides
which can attach and act as a template strand

Question 21

what is endocytosis

Answer 21

the prod of vesicle