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Life Science Review Qrt 1 and 2

Total questions: 167

Worksheet time: 3hrs 41mins

Name
Class
Date
1.

Biology starts at the level of ___________ and moves through the study of biospheres.

a)

atoms

b)

cells

c)

organs

d)

organisms

2.

The basic building blocks of matter

a)

atoms

b)

elements

c)

molecules

d)

organisms

3.

A living thing

a)

element

b)

molecule

c)

isotope

d)

organism

4.

The correct order for the organization of living things is

a)

cell -> tissue -> organ -> organ system -> organism

b)

cell -> atom -> organ system -> organism -> tissue

c)

cell -> atom -> molecule -> organism -> organ system

d)

tissue -> cell -> organism -> organ -> organ system

5.

a major component of genes and proteins

a)

nitrogen

b)

sulfur

c)

iron

d)

oxygen

6.

major part of photosynthesis and respiration

a)

carbon

b)

hydrogen

c)

sulfur

d)

calcium

7.

makes up about 63% of the mass of animals and 75% of the mass of plants

a)

nitrogen

b)

carbon

c)

oxygen

d)

hydrogen

8.

the main element in the hard part of bones

a)

nitrogen

b)

hydrogen

c)

oxygen

d)

calcium

9.

is an important part of dna molecules

a)

phosphorus

b)

hydrogen

c)

sulfur

d)

iron

10.

non found naturally in earth, must be combined with other elements like oxygen

a)

phosphorus

b)

sulfur

c)

calcium

d)

hydrogen

11.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
12.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
13.
Carbon is considered an element while carbon dioxide is considered a compound. This is because carbon dioxide is –
a)
a gas at room temperature.
b)
made of two different elements.
c)
given off by green plants.
14.

What is the difference between CO and Co?

a)

They are the same.

b)

CO is an element and Co is a compound.

c)

CO is a compound and Co is an element.

15.
What cannot be broken down into other substances?
a)
Compound
b)
Mixture
c)
Solids
d)
Element
16.

All matter is made of _____.

a)

light

b)

energy

c)

cells

d)

atoms

17.

What is the function of the ribosome?

a)

the place where proteins are made

b)

organelle that breaks down sugar to release the energy in it

c)

uses light energy to make sugar from carbon dioxide and water

d)

used for temporary storage of materials like water, waste, food and other cellular materials

(these are very large in plant cells)

18.

What is the function of the mitochondrion?

a)

contain digestive chemicals that help break down food molecules, cell wastes, and worn-out cell parts.

b)

organelle that breaks down sugar to release the energy in it

c)

region of the nucleus helps make ribosomes

d)

sort proteins and other cellular substances and package them into vesicles

19.

What is the function of the endoplasmic reticulum?

a)

rganelle that breaks down sugar to release the energy in it

b)

protects the cell and regulates interactions between the cell and its environment

c)

contains the instructions for everything the cell does

d)

processes cellular materials and allows for the movement of these materials around the cell

20.
You are made up of...
a)
eukaryotic cells
b)
prokaryotic cells
c)
plant cells
d)
bacterial cells
21.
Which organelle is shown?
a)
chloroplast
b)
mitochondrion
c)
endoplasmic reticulum
d)
Golgi body
22.
What compound is produced in this organelle?
a)
glucose
b)
oxygen
c)
DNA
d)
ATP
23.
Function of this organelle?
a)
protein synthesis
b)
transport proteins
c)
modify, package, and ship proteins
d)
storage of water, food or wastes
24.

Function of this organelle?

a)

transport proteins

b)

package and ship proteins

c)

synthesize proteins

d)

digests food and worn-out organelles

25.

What is a group of cells that are alike and work together?

a)

a cell team

b)

a tissue

c)

a cell family

26.

Cells form tissues, tissues form organs, organs work together to form

a)

lungs

b)

organ systems

c)

skin

d)

heart

27.

Organs that work together are part of a(n) ________________________.

a)

cells

b)

tissue

c)

organ system

28.
Which organelle belongs in plant cells only?
a)
Cell Membrane
b)
Mitochondrion
c)
Chloroplast
d)
Nucleus
29.
Which organelle belongs in both plant and animal cells?
a)
Cytoplasm
b)
Chloroplast
c)
Large Central Vacuole
d)
Cell Wall
30.
Which organelle belongs in both plant and animal cells?
a)
Chloroplast
b)
Cell Wall
c)
Large Central Vacuole
d)

Nucleus

31.
The ___________ is the basic unit of life
a)
organ
b)
cell
c)
atom
d)
tissue
32.

For her science project, Suzanne made an animal cell using a rectangular shoe box, pipe cleaners, and construction paper. One comment that the teacher made was that Suzanne should not have used a shoe box. Why did the teacher make this comment?

a)

Animal cells are more round and do not have a rigid cell wall.

b)

Animal cell shape is more like a stop sign than a rectangle.

c)

Plant cell shape is more round than rectangular.

d)

Plant and animal cells have a similar shape.

33.

Four cells were examined under the microscope. The following table shows the organelles that were identified in each cell. Based on the table above, which of the following is the best conclusion?

a)

Cells A and B are plant cells.

b)

Cells B and D are plant cells.

c)

Only cell B is a plant cell.

d)

Only cell C is a plant cell.

34.

An animal cell has the following except a/an...

a)

Nucleus

b)

Lysosome

c)

Cell Wall

d)

Endoplasmic reticulum

35.

Which of the followings are types of animal tissue?

a)

connective

b)

muscle

c)

ground

d)

epithelial

36.

Which of the followings are types of plant tissues?

a)

connective

b)

epidermal

c)

vascular

d)

epithelial

37.

This tissue is found in between other tissues everywhere in the body. Which tissue is this?

a)

connective

b)

muscle

c)

epithelial

d)

nervous

38.

This tissue is responsible for movements in our body.

a)

connective

b)

muscle

c)

epithelial

d)

nervous

39.

This tissue makes the organ system that controls the body's movements, sends and carries signals to and from the different parts of the body, and has a role in controlling bodily functions. Which tissue is this?

a)

connective

b)

muscle

c)

epithelial

d)

nervous

40.

What is mean by homeostasis?

a)

Controls and coordinates body activities through chemical

b)

controls and coordinates body activities through electrical impulses

c)

For maintenance of a steady state in the internal environment

d)

remove metabolic waste products from the cel

41.

The balanced maintenance of an organism’s internal environment is called:

a)

compensating

b)

homeostasis

c)

balancing

d)

routine

42.

The group of organisms that use the process of homeostasis includes

a)

mammals, only

b)

animals, only

c)

plants and animals

d)

all living things

43.

Which organ acts as a control center of a homeostasis process?

a)
b)
c)
d)
44.
Which of these lists presents the stages of the cell cycle in the correct order?
a)
interphase, mitosis, cytokinesis
b)
cytokinesis, mitosis, interphase
c)
mitosis, interphase, cytokinesis
d)
interphase, cytokinesis, mitosis
45.

Cells of organism must replicate for ?

a)

growth

b)

repair of damaged tissue

c)

replacement of dying cells.

d)

All of the above

46.
The division of the nucleus is known as:
a)
Synthesis
b)
Mitosis
c)
G1
d)
G2
47.
Which part of the Cell Cycle takes the longest?
a)
Interphase
b)
Mitosis
c)
Prophase
d)
Cytokinesis
48.

In which stage of the cell cycle does nuclear splitting take place?

a)

G2

b)

S

c)

Mitosis

d)

Cytokinesis

49.

What is the division of cytoplasm called?

a)

chromosome

b)

mitosis

c)

cytokinesis

d)

the cell cycle

50.
Where does a cell contain it's genetic material?
a)
nucleus
b)
nucleolus
c)
cytoskeleton
d)
golgi
51.
The division of the nucleus is known as:
a)
Synthesis
b)
Mitosis
c)
G1
d)
G2
52.
The cell spends most of it's life in ________________.
a)
mitosis
b)
cytokinesis
c)
Interphase
d)
None of the above
53.
Which best describes the main job of most cells in multicellular organisms?
a)
Cells work to keep themselves alive.
b)
Cells work to keep the organism alive.
c)
Cells work to release needed materials.
d)
Cells work to store unneeded materials.
54.
How are single-celled organisms and multi-celled organisms similar?
a)
Both need food for energy and growth.
b)
Both have a skeletal system for support.
c)
Both require the interaction of many cells to survive.
d)
Both are able to carry out all life functions in only one cell.
55.
Fungi and bacteria are both single-celled organisms. What do they most likely have in common?
a)
Both fungi and bacteria are large organisms.
b)
Both fungi and bacteria can carry out all life functions in their one cell.
c)
Both fungi and bacteria need sunlight and nutrients from the soil to be able to grow.
d)
Both fungi and bacteria are highly specialized to do only one job so they must work with other cells to obtain food.
56.
A scientist is trying to decide whether an organism is unicellular or multicellular.  Which information would help the scientist most to make her decision?
a)
size of the cells of the organism
b)
what the organism eats
c)
how many types of cells are in the organism
d)
how fast the organism grows
57.
Multicellular Organisms
a)
Made of 1 cell
b)
Made of more than 1 cell
58.

Bacteria is an example of a(n) ______ organism.

a)

unicellular

b)

multicellular

c)

nonliving

d)

mammal

59.

1. What does the prefix "uni" means?

a)

1. Two

b)

2. One

c)

4.many

60.

3. What does the prefix "multi" means?

a)

1. many

b)

2. one

c)

3. single

61.
Fungi, Plants, and Animals
a)
Unicellular organisms 
b)
Multicellular organisms
62.
The stages of mitosis in order
a)
Metaphase, Anaphase, Prophase, Telophase
b)
Prophase, Anaphase, Metaphase, Telophase
c)
Prophase, Metaphase, Anaphase, Telophase
d)
Anaphase, Prophase, Telophase, Metaphase
63.
How many cells are created at the end of Mitosis?
a)
1 diploid cell
b)
2 diploid cells
c)
3 diploid cells
d)
4 diploid cells
64.
The process on the left is:
The process on the right is:
a)
Left: meiosis
Right: meiosis
b)
Left: meiosis
Right: cloning
c)
Left: mitosis
Right: meiosis
d)
Left: mitosis
Right: mitosis
65.
After meiosis is complete how many cells will there be?
a)
1
b)
2
c)
3
d)
4
66.

What occurs in meiosis but NOT in mitosis?

a)

chromosome replication

b)

the joining of homologous chromosomes and crossing over.

c)

production of daughter cells

d)

alignment of chromosomes along the metaphase plate (middle)

67.

One division

a)

Mitosis

b)

Meiosis

c)

Both MItosis and Meiosis

68.

Daughter cells are not identical to parent cell

a)

Mitosis

b)

Meiosis

c)

Both MItosis and Meiosis

69.

Results with same # of chromosomes as parent cell

a)

Mitosis

b)

Meiosis

c)

Both MItosis and Meiosis

70.

Daughter cells are identical to parent cell

a)

Mitosis

b)

Meiosis Both

c)

MItosis and Meiosis

71.

Creates body cells

a)

Mitosis

b)

Meiosis

c)

Both MItosis and Meiosis

72.

Starts with one parent cell

a)

Mitosis

b)

Meiosis

c)

Both MItosis and Meiosis

73.

Associated with sexual reproduction

a)

Mitosis

b)

Meiosis

c)

Both MItosis and Meiosis

74.

Undergoes DNA replication

a)

Mitosis

b)

Meiosis

c)

Both MItosis and Meiosis

75.
The cell cycle is ______________.
a)
the process of cells circling throughout the body
b)
the process of splitting the organelles
c)
a process where one cell gets energy
d)
the sequence of stages of growth and division that a cell undergoes
76.

During interphase the cell ___________.

a)

divides into two cells

b)

divides its nucleus

c)

replicates its DNA

d)

replicates the organelles within the cell

77.
After interphase is completed the cell moves into the next stage of the cell cycle called _________.
a)
anaphase
b)
cytokinesis
c)
metaphase
d)
mitosis
78.
Mitosis is made up of how many phases?
a)
4
b)
5
c)
6
d)
7
79.
The following describes __________ during mitosis. The chromatin condenses and spindle fibers form at each side of the cell. The nuclear membrane breaks apart.
a)
prophase
b)
metaphase
c)
anaphase
d)
telophase
80.
The following describes ________  during mitosis. The chromosomes line up along the center of the cell and the spindle fibers attach to each chromosome at the centromere.
a)
prophase
b)
metaphase
c)
anaphase
d)
telophase
81.
The following describes _________ during mitosis. The spindle fiber splits the centromere and the chromatids move to opposite sides of the cell.
a)
prophase
b)
metaphase
c)
anaphase
d)
telophase
82.

What happens after mitosis in order to divide the cytoplasm?

(a)  

83.

Cyto means cell(s) and kinesis means movement

a)

True

b)

False

84.

What is the division of cytoplasm called?

a)

chromosome

b)

mitosis

c)

cytokinesis

d)

the cell cycle

85.
True or False: Fission is a way to reproduce asexually.
a)
True
b)
False
86.

Cell division in prokaryotes that forms two genetically identical cells.

a)

cloning

b)

budding

c)

fission

d)

regeneration

e)

vegetative reproduction

87.

When a new organism grows by mitosis and cell division on the body of its parent.

a)

budding

b)

fission

c)

regeneration

d)

vegetative reproduction

e)

mitotic cell division

88.

Occurs when an animal offspring grows from a piece of its parent.

a)

fission

b)

budding

c)

mitotic cell division

d)

regeneration

e)

vegetative

89.

An example of an organisms that can typically reproduce through regeneration.

a)

sea urchins

b)

sea stars

c)

sponges

d)

planarians

e)

all of these

90.

Which types of organisms typically reproduce by fission?

a)

hydra

b)

bacteria

c)

planaria

d)

plants

e)

all of these

91.

A positive aspect (thing) about asexual reproduction is that ______________________.

a)

there is no genetic diversity

b)

it is easier, faster, and makes more offspring

c)

there is genetic diversity

d)

it requires a male and female

92.

A negative aspect (thing) about asexual reproduction is that there is/are ______________________.

a)

no genetic diversity

b)

sperm and eggs being made

c)

genetic diversity

d)

possible difficulty in finding a mate if you are a rare species

93.

A negative aspect (thing) about sexual reproduction is that there is/are ______________________.

a)

no genetic diversity

b)

all clones being produced

c)

genetic diversity

d)

possible difficulty in finding a mate if you are a rare species

94.

A positive aspect (thing) about sexual reproduction is that there is/are ______________________.

a)

no genetic diversity

b)

all clones being produced

c)

genetic diversity

95.

Some advantages of sexual reproduction include: (select all that apply)

a)

genetic variation

b)

improves chances of adapting to the environment

c)

helps species survive catastrophes

d)

it doesn't take as much energy as asexual reproduction

96.

What type of asexual reproduction does the figure represent?

a)

Binary Fission

b)

Budding

c)

Vegetative Propagation

d)

Fragmentation

97.

What type of asexual reproduction does the figure represent?

a)

Binary Fission

b)

Budding

c)

Vegetative Propagation

d)

Fragmentation

98.

What do we call the table used to calculate the probability of an offspring's genotype?

a)

Punnett Square

b)

Venn Diagram

c)

Avogadro's Graph

d)

Circle of Life

99.

Dominant genotypes are written with:

a)

Upper case always

b)

Lower case always

100.

Recessive genotypes are written with:

a)

Upper case always

b)

Lower case always

101.

Dd is

a)

Dominant

b)

Recessive

c)

Both

d)

None

102.

dd is

a)

Dominant

b)

Recessive

c)

Both

d)

None

103.

TT and Tt are/is

a)

Dominant

b)

Recessive

c)

Both

d)

None

104.

"T" is dominant, "t" is recessive. If an organism has the genes "Tt."

Which will trait will result?

a)

"T" dominant

b)

"t" recessive

105.

"G" is dominant, "g" is recessive. If an organism has the genes "gg."

Which will trait will result?

a)

"G" dominant

b)

"g" recessive

106.

A ______ is part of the DNA code on a chromosome.

a)

gene

b)

genotype

c)

phenotype

d)

gender

107.

A genetic factor that blocks another genetic factor is called a(n) _______.

a)

genetic trait

b)

heredity trait

c)

recessive trait

d)

dominant trait

108.

The study of ______ is called genetics.

a)

heredity

b)

dominance

c)

pea plants

d)

mutations

109.

Gregor Mendel studied heredity using _____ plants.

a)

rose

b)

pea

c)

maize

d)

tundra

110.

________ is the study of how traits are passed from parents to offspring.

a)

Fertilization

b)

Genetics

c)

Seed production

d)

Selective breeding

111.

A recessive trait is observed when _______ recessive genetic factors are present in offspring.

a)

0

b)

1

c)

2

d)

3

112.
What is the phenotype for the recessive trait?
a)
brown eyes
b)
green eyes
c)
blue eyes
113.

A flower's red color an example of a....

a)

Genotype

b)

Phenotype

114.

A dog's soft fur an example of a....

a)

Genotype

b)

Phenotype

115.

TT an example of a....

a)

Genotype

b)

Phenotype

116.

Tt an example of a....

a)

Genotype

b)

Phenotype

117.

This is the concrete and observable result of organism’s genotype.

(a)  

118.

This refers to the pairing of alleles showing an individual's collection of genes.

(a)  

119.

The two types of alleles are (select two)

a)

dominant

b)

doughnut

c)

expressive

d)

recessive

120.

The different forms of a gene

a)

alleles

b)

atoms

c)

proteins

d)

wheels

121.

Segments of DNA are called _______________________

a)

Genes

b)

Alleles

c)

Traits

d)

Chromosomes

122.

Which of the following is the correct definition for a genotype?

a)

The physical expression of a gene. (Characteristics)

b)

A strand of DNA made up of multiple mutations.

c)

The expression of one of your parents traits.

d)

The set of genes in our DNA which is responsible for a particular trait.

123.

Which of the following is the correct definition for a phenotype?

a)

The physical expression of a gene. (Characteristics)

b)

A strand of DNA made up of multiple mutations.

c)

The expression of one of your parents traits.

d)

The set of genes in our DNA which is responsible for a particular trait.

124.
Colorblindness is a sex-linked recessive disorder. A normal woman whose father was colorblind marries a man with normal color vision. What percentage of their sons will be colorblind?
a)
0%
b)
25%
c)
50%
d)
100%
125.
Why is the gene for a disease or disorder more likely to be found on the X chromosome than Y?
a)
The X chromosome has many more genes
b)
The Y chromosome has many more genes
126.
Males are more likely to suffer from a sex-linked disease or disorder because
a)
males are the weaker sex
b)
males have less DNA
c)
males have 1 X chromosome, so the disorder is more likely to be expressed
127.
When we say that a woman is a carrier for a genetic disease or disorder it means that
a)
she has 1 gene, but not the disorder
b)
she has 2 genes for the disorder
c)
she can pass the gene only to male children
d)
she can pass the gene only to female children
128.
If a gene is found only on the X chromosome and not the Y chromosome, it is said to be 
a)
sex-linked trait
b)
polygenic trait
c)
codominant trait
d)
incomplete dominance trait
129.
Any change in the sequence of DNA is...
a)
transgenic shift
b)
Single Genotype
c)
Monohybrid Trait
d)
Mutation
130.

How does a mutation affect an organism?

a)

It changes their traits

b)

It changes their DNA only

c)

It doesn't change anything

131.

When one or both parents pass down a mutation, it is called?

a)

Genetic Mutation

b)

Inherited Mutation

c)

Chromosome mutation

132.

When there is a small change in an organisms DNA, it s called?

a)

genetic mutation

b)

inherited mutation

c)

chromsome mutation

133.

When a mutation happens in the chromosomes, it s called?

a)

genetic mutation

b)

inherited mutation

c)

chromosome mutation

134.

In what 3 ways can genes be mutated? (hint: 3 answers)

a)

Deletion

b)

Substitution

c)

Added

d)

Mutated

135.
What does DNA stand for?
a)
Deoxyribose Nucleic Acid
b)
Denatured Natural Acid
c)
Do Not Accept
d)
I Don't Know
136.
What does DNA do?
a)
a.  It carries genetic codes from parents to offspring.
b)
a.  It carries oxygen from the lungs to the body.
c)
a.  It tells you who you are.
d)
a.  It defines the organism.
137.
What is the shape of a DNA?
a)
Double Helix
b)
Base Pairing
c)
The shape of you
d)
Hydrogen Bonding
138.
Adenine, Cytosine, Guanine and Thymine are examples of
a)
DNA structure
b)
DNA bases
c)
DNA double helix
d)
Paired bases
139.
The rules of DNA pairing states that Adenine (A) always pairs up with
a)
Thymine
b)
Cytosine
c)
Adenine
d)
Guanine
140.
The rules of DNA pairing states that Cytosine (C) always pairs up with
a)
Thymine
b)
Cytosine
c)
Adenine
d)
Guanine
141.
The sequence of bases forms the
a)
Genetic Code
b)
DNA base pair
c)
Double Helix
d)
Paired bases
142.
What holds the DNA bases together?
a)
Hydrogen bonds
b)
DNA bases
c)
Double Helix
d)
Paired bases
143.
What is a DNA molecule made of?
a)
Base, sugar, phosphate
b)
Base, sugar, coffee
c)
Base, roof, height
d)
DNA, sugar, phosphate
144.
What determines the code, or information, of a DNA molecule?
a)
the shape (structure) of the nitrogen bases
b)
the order (sequence) of the nitrogen bases
c)
the color of the nitrogen bases
d)
the frequency (number) of nitrogen bases
145.
Which 2 molecules form the sides (backbone) of the DNA ladder?
a)
deoxyribose sugar and adenine
b)
deoxyribose sugar and a hydrogen bond
c)
deoxyribose sugar and the nucleus
d)
deoxyribose sugar and phosphate
146.
What are the three components of a nucleotide?
a)
sugar, hydrogen, nitrogen base
b)
sugar, oxygen, nitrogen base
c)
sugar, phosphate, nitrogen base
d)
sugar, phosphate, protein
147.
A process in which DNA has the unique ability to make an exact copy of itself.
a)
Replication
b)
Translation
c)
Transcription
148.
Which of the following units are repeatedly joined together to form a strand of DNA?
a)
amino acids
b)
nucleotides
c)
fatty acids
d)
polysaccharides
149.
RNA contains the sugar
a)
ribose
b)
deoxyribose
c)
glucose
d)
lactose
150.
Which of the following statements is true?
a)
DNA is single-stranded
b)
RNA is single-stranded
c)
DNA contains uracil
d)
RNA contains deoxyribose
151.
What is the difference between DNA and RNA in terms of bases?
a)
RNA contains uracil in place of thymine
b)
RNA contains uracil in place of adenine
c)
RNA contains uracil in place of guanine
d)
RNA contains uracil in place of  cytosine
152.
What is the difference between DNA and RNA in terms of bases?
a)
RNA contains uracil in place of thymine
b)
RNA contains uracil in place of adenine
c)
RNA contains uracil in place of guanine
d)
RNA contains uracil in place of  cytosine
153.
How does RNA differ from DNA?
a)
RNA contains uracil and deoxyribose
b)
RNA contains ribose and thymine
c)
RNA contains uracil and ribose
d)
RNA contains adenine and ribose
154.
Which of the following describes RNA?
a)
RNA is usually double-stranded and contains the base thymine
b)
RNA is usually single-stranded and contains the base uracil
c)
RNA is longer than DNA and uses five bases to encode information
d)
RNA is made in the nucleus of eukaryotic cells and stays there to carry out its functions
155.
The process by which the genetic code of DNA is copied into a strand of RNA is called
a)
translation
b)
transcription
c)
transformation
d)
replication
156.
What shape is RNA?
a)
single helix
b)
double helix
157.
What are proteins composed of?
a)
nitrogen bases
b)
amino acids
158.
Where does transcription take place?
a)
at a ribosome
b)
in the nucleus
c)
at a mitochondria
d)
at a lysosome
159.

What does tRNA "transfer"?

a)

amino acids

b)

nucleic acids

c)

nucleotides

d)

AUG

160.
What does DNA stand for?
a)
Deoxyribonucleic acid
b)
Denitrogenous acid
c)
Deribonucleic acid
d)
Diribonucleic acid
161.
Which of the following best describes a DNA molecule?
a)
double helix
b)
contains ribose
c)
made of amino acids
d)
contains Uracil
162.
the process of making a copy of DNA
a)
transcription
b)
double helix
c)
DNA replication
d)
replication fork
163.
What are the building blocks of proteins?
a)
amino acid
b)
fatty acid
c)
nucleotide
d)
lipid
164.
Who said, "The amount of A = the amount of T, and the amount of G = the amount of C"?
a)
Chargaff
b)
Avery
c)
Griffith
d)
Franklin
165.
What did Erwin Chargaff conclude from his experiments?
a)
Nitrogen bases are held together by peptide bonds
b)
A and T, C and G always occur in equal amounts
c)
Proteins are the carriers of genetic information
d)
C and G rarely occur in eukaryotic organisms
166.

Who took a picture of DNA using X-ray diffraction?

a)

Rosalind Franklin

b)

Watson & Crick

c)

Oswald Avery

d)

Hershey & Chase

167.

Who developed the double-helix model of DNA?

a)

Watson & Crick

b)

Avery

c)

Hershey & Chase

d)

Franklin

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