Exam 1

Question 1

The Cohesive property of water is due to what?

Answer 1

Hydrogen Bonds

Question 2

T/F enzymes are carbohydrates that speed up reactions

Answer 2

FALSE

Question 3

Enzymes have active sites for ______

Answer 3

substrates

Question 4

what is protein catalysts?

Answer 4

enzymes

Question 5

what is a reactant that is altered by an enzyme

Answer 5

substrate

Question 6

chemical that lowers activation energy and increases rate of reaction

Answer 6

catalyst

Question 7

absorbs/requires energy, products have more energy than reactants

Answer 7

anabolic reaction

Question 8

releases energy, products have less energy than reactants

Answer 8

catabolic reaction

Question 9

What affects enzyme function?

Answer 9

denaturation

Question 10

making or breaking of chemical bonds, chemical bonds contain energy

Answer 10

chemical reaction

Question 11

a nucleotide contains?

Answer 11

phosphate, 5-carbon sugar, nitrogeneous base

Question 12

what are the nucleic acids

Answer 12

DNA and RNA

Question 13

what do nucleic acids do?

Answer 13

store hereditary info

Question 14

protein with more than 1 amino acid chain

Answer 14

quaternary protein structure

Question 15

alpha helixes and pleated sheets attract

Answer 15

tertiary protein structure

Question 16

what is a monomer or proteins

Answer 16

amino acids

Question 17

the primary protein structure is also known as

Answer 17

the chain of amino acids

Question 18

what are amino acid chains linked by H bonds, pleated sheets/alpha helixes

Answer 18

secondary protein structure

Question 19

inserting of a water molecule to break down a polymer into monomers

Answer 19

dehydration hydrolysis

Question 20

a reaction that removes water from molecules to build a polymer from monomers

Answer 20

dehydration synthesis

Question 21

the bond between hydrogen and oxygen that form water molecules are??

Answer 21

polar Covalent bonds

Question 22

T/F : ionic bonds share electrons between atoms

Answer 22

True

Question 23

What type of bond is C=C and how many electrons does each carbon contribute to form this bond?

Answer 23

double covalent bond and 2 electrons

Question 24

water shows high cohesive function and surface tension due to what type of bonds?

Answer 24

hydrogen bonds

Question 25

this enzyme excises thymine dimers that form from UV radiation for DNA repair

Answer 25

endonuclease

Question 26

this enzyme unwinds dan for replication

Answer 26

helicase

Question 27

this enzyme bonds okasaki fragments together

Answer 27

ligase

Question 28

Hershey and Chase showed that DNA and not proteins forms the genetic material that a virus inserts into a bacteria by radiolabeling DNA and proteins with ______

Answer 28

Radiolabeled Phosphate in DNA and Sulfur in Proteins

Question 29

The difference between heterochromatin and euchromatin is ______.

Answer 29

Euchromatin is transcribed and hetero. is not, hetero. is condensed DNA and Euch. is loosely packed

Question 30

this enzyme releases the winning stress on the DNA when the replication bubble forms

Answer 30

topoisomerase

Question 31

what is the site that holds the next tRNA with the amino acid to add

Answer 31

the A site of the ribosome

Question 32

what removes the introns from DNA

Answer 32

spliceosome

Question 33

if there is a point mutation in the DNA that results in an amino acid being changed. This would be a

Answer 33

missense mutation

Question 34

The DNA is AAT; what is the mRNA codon and anticodon on the tRNA

Answer 34

mRNA codon UUA and tRNA anticodon will be AAU

Question 35

point mutation in the DNA that results in a codon for the same amino acid as the original codon making it a protein

Answer 35

silent mutation

Question 36

a base pair is a deleted/ added and changes the reading frame of the codons

Answer 36

frameshift mutation

Question 37

The DNA is CAT; what is the anticodon on the tRNA

Answer 37

CAU

Question 38

forms the exoskeleton in anthropods

Answer 38

chitin

Question 39

Potassium has an atomic number of 19 and an atomic weight of 39. What does this mean in terms of protons, neutrons and electrons?

Answer 39

Protons: 19 electrons: 19 neutrons: 20

Question 40

what is the storage form of glucose in animals

Answer 40

glycogen

Question 41

what are disaccharides

Answer 41

sucrose and lactose

Question 42

what is a start codon

Answer 42

AUG

Question 43

A protein of 150 amino acids was formed by removing _____ water molecules in a ________ reaction.

Answer 43

149, dehydration

Question 44

what is the storage form of glucose in plants?

Answer 44

amylose (starch)

Question 45

what is a dietary fiber?

Answer 45

lactose

Question 46

You have a DNA sequence: GAACGATACTAC What would be the sequence of the second strand of DNA during Replication?

Answer 46

CTTGCTATGATG

Question 47

You have a DNA sequence: GAACGATACTAC What would be the sequence of the mRNA?

Answer 47

CUUGCUAUGAUG

Question 48

how many amino acids does DNA code for?

Answer 48

4

Question 49

Glycogen is broken down to glucose by liver cells in between meals. If glycogen consists of 200 glucose molecules. How many water molecules must be added to form the 200 glucose molecules in a ________ reaction?

Answer 49

199, hydrolysis