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2023 Q3 Biology CSA

Total questions: 60

Worksheet time: 10hrs 0mins

Name
Class
Date
1.
What are the nucleotides made of?
a)
Sugar, Phosphate, nitrogen base
b)
Phosphate, Adenine, nitrogen base
c)
Thymine, Adenine, Cytomine
d)
Phosphate, Nitrogen, Adenine
2.
Adenine bonds with ______________.
a)
Guanine
b)
Thymine
c)
Cytosine
d)
Adenine
3.
Guanine bonds with ______________.
a)
Adenine
b)
Guanine
c)
Cytosine
d)
Thymine
4.
Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG
a)
ATG TGA CAG
b)
TAC ACT GTC
c)
GTA AGT GAC
d)
CAT TCA CTG
5.
Which 2 molecules forms the sides (backbone) of the DNA ladder?
a)
deoxyribose and adenine
b)
deoxyribose and a hydrogen bond
c)
sugar and the nucleus
d)
deoxyribose (sugar) and phosphate
6.
The two strands of nitrogenous bases in DNA are joined by which type of bond?
a)
polar bonds
b)
ionic bonds
c)
covalent bonds
d)
hydrogen bonds
7.
The enzyme that unzips the DNA to prepare for replication
a)
helicase
b)
replicase
c)
polymerase
d)
synthase
8.
DNA replication results in two DNA molecules,
a)
each one with two original strands
b)
each one with two new strands
c)
each one with one new strand and one original strand
d)
one with two new strands and the other with two original strands
9.
order of replication
a)
3, 2, 1, 4
b)
2, 1, 4, 3
c)
2, 3, 1, 4
d)
3, 4, 1, 2
10.
Based on the diagram, the enzyme (represented in gray) is most likely...
a)
DNA polymerase
b)
DNA Ligase
c)
Nuclease
d)
Helicase
11.
Rosalind Franklin's "photo 51" was critical in helping Watson and Crick to discover what?
a)
The double helix structure of DNA
b)
X-Ray crystalography was a technology worth looking in to. 
c)
That stealing is a great way to get ahead in life
d)
That there could possibly be life on other planets. 
12.
This is one job proteins do NOT have in the body
a)
storing genetic information
b)
structure
c)
speed up chemical reactions
d)
transport things through cell membrane
13.
What is the monomer of proteins?
a)
amino acids
b)
polypeptides
c)
nucleotides
d)
monosaccharides
14.
What 3 letters do enzymes typically end in?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
15.
Which of the following conclusions can be drawn from this graph?
a)
The optimum pH of the enzyme is 6.6.
b)
The optimum pH of the enzyme is 5.8
c)
The enzyme’s activity increases as pH increases 5.0 to 9.0
d)
The enzyme’s activity is greater around pH of 8.0 .
16.

What is a substance called if it speeds up a chemical reaction?

a)

reusable

b)

catalyst

c)

specific

d)

fragile

17.

In the diagram, what is letter A?

a)

product

b)

enzyme-substrate complex

c)

substrate

d)

active site

18.

Letter D...

a)

enzyme

b)

active site

c)

substrate

d)

products

19.

Letter B...

a)

substrate

b)

active site

c)

enzyme

d)

products

20.

Letter C...

a)

products

b)

substrate

c)

enzymes

d)

active site

21.

Letter E...

a)

active site

b)

products

c)

substrate

d)

enzyme

22.
How would the DNA sequence GCTATA be transcribed to mRNA?
a)
GCUAUA
b)
CGATAT
c)
CGAUAU
d)
GCUTUT
23.
RNA is read in sections called:
a)
Triplets
b)
Genes
c)
Codons
d)
Genes
24.
Translation is a process that produces
a)
mRNA
b)
Protein
c)
Polypeptide Chains
d)
tRNA
25.

What is the order for Protein Synthesis?

a)

Transcription -> Translation -> Protein

b)

Translation - > Transcription -> Protein

c)

Protein -> Transcription -> Translation

d)

Translation -> Protein -> Transcription

26.
What is the location in the cell for translation?
a)
nucleus
b)
mitochondria
c)
ribosome
d)
chloroplast
27.

Use the mRNA below to select the correct amino acid sequence:

AUG-UCA-AAA-UAG

a)

MET-SER-LYS-STOP

b)

MET-THR-LYS-TYR

c)

LEU-SER-CYS-STOP

d)

ILE-LYS-SER-STOP

28.

Which amino acid matches with the following codon:

CAC

a)

STOP

b)

HIS

c)

LYS

d)

ARG

29.
Heterozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
30.
G = green, g = yellow
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
31.
Which of the following alleles is homozygous (purebred) recessive?
a)
Tt
b)
tt
c)
TT
d)
t
32.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
33.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
34.
How many alleles (letters) does a child get from each parent for each trait?
a)
1
b)
2
c)
3
d)
4
35.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
36.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
37.
One form of a gene is called_______________
a)
a DNA
b)
a Phenotype
c)
a trait
d)
an allele
38.
In this punnett square, which is the dominant trait?
The B stands for bud.
a)
purple flower bud
b)
white flower bud
c)
dominant
d)
recessive
39.
W=white hair
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
a)
none
b)
3/4
c)
1/2
d)
all
40.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
41.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
42.

What is the probability of producing a tall pea plant from a cross between two hybrid tall pea plants?

a)

25%

b)

50%

c)

75%

d)

100%

43.

A mutation is

a)

any change that is harmful

b)

any change in a gene or chromosome

c)

any change that is helpful

d)

any change in the phenotype

44.

Which term refers to physical characteristics that are studied in genetics

a)

traits

b)

offspring

c)

generations

d)

hybrids

45.

If a homozygous black cat (BB) is crossed with a homozygous white cat (bb), what is the probability of having a cat with white fur?

a)

100%

b)

0%

c)

75%

d)

25%

46.
Genotype refers to the ...
a)
physical expression of the genes
b)
the possible combination of alleles in a gene
c)
whether an allele is dominant or recessive
d)
how an organism will appear
47.
Term for an organism that display two dominant phenotypes at the same time
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
linked genes
48.

WHAT DOES MEIOSIS CREATE?

a)

CHROMOSOMES

b)

GAMETES

c)

DNA

d)

TRAITS

49.

THE END RESULT OF MEIOSIS IS...

a)

FOUR UNIDENTICAL GAMETES

b)

FOUR IDENTICAL GAMETES

c)

TWO IDENTICAL GAMETES

d)

TWO UNIDENTICAL GAMETES

50.

THE GAMETES ARE CONSIDERED TO HAVE ONE HALF OF THE GENETIC INFO SO IT IS CALL

a)

DIPLOID (2N)

b)

DIPLOID (N)

c)

HAPLOID (2N)

d)

HAPLOID (N)

51.

HOW MANY CHROMOSOMES DO HUMAN GAMETES HAVE?

a)

46

b)

23

c)

47

d)

22

52.

CROSSING OVER ALLOWS FOR WHAT TO HAPPEN?

a)

ALL CELLS TO STAY THE SAME

b)

GENETIC VARIATION

c)

REDUCTION OF CHROMOSOMES

d)

CHROMOSOME NUMBER TO INCREASE

53.

THIS IMAGE SHOWS WHAT IS HAPPENING WITH THE CHROMOSOMES?

a)

NON- DISJUNCTION

b)

METAPHASE

c)

TELOPHASE

d)

CROSSING OVER

54.
A dog has 78 chromosomes in its body cells.  What is the diploid number?
a)
78
b)
39
c)
1
d)
100
55.
Body cells have diploid or haploid number of chromosomes?
a)
Haploid
b)
Diploid
56.
Meiosis produces cells with a haploid or diploid number of chromosomes?
a)
Haploid
b)
Diploid
57.
How many cells are produced in Mitosis?
a)
1
b)
2
c)
3
d)
4
58.
What occurs during interphase?
a)
Two cells are formed
b)
The nucleus disappears
c)
Chromosomes line up in the middle of the cell
d)
DNA synthesized and cell grows
59.
How many cells are produced in meiosis?
a)
1
b)
2
c)
3
d)
4
60.

All animals have ____________ cells meaning all cell parts are contained within membranes.

a)

diploid

b)

eukaryote

c)

haploid

d)

prokaryote

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