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BioSemExam Part 3
Test Description: Semester test
Instructions: Answer all questions to get your test result.
1) The offspring of two chickens have a 1 out of 4 chance of being white, which is a recessive trait. Which cross could produce the probability of such offspring?
A
YY x YY
B
yy x yy
C
YY x Yy
D
Yy x Yy
2) The hereditary information of an organism is carried in its genes. A gene is a long molecule of-
A
Protein
B
RNA
C
DNA
D
Carbohydrates
3) Which parent determines the sex of the offspring?
A
none of the above
B
mother
C
father
D
both, equally
4) A genetic counselor is examining a karyotype from a patient when an extra copy of chromosomes 13 noticed. This condition is referred to as
A
trisomy
B
diploidy
C
monosomy
D
triploidy
5) Which base sequence cannot occur in RNA?
A
AAGCCC
B
TGCTAT
C
CCUAAC
D
GCUAGG
6) Which nitrogen base is only found in an RNA nucleotide?
A
Uracil
B
Guanine
C
Adenine
D
Thymine
7) Which lists the components of an RNA nucleotide?
A
deoxyribose, phosphate, cytosine
B
ribose, phosphate, thymine
C
deoxyribose, phosphate, uracil
D
ribose, phosphate, uracil
8) DNA is made up of-
A
Nucleotides
B
Ribosomes
C
Proteins
D
Cells
9) Which component is found in DNA but not in RNA?
A
single-stranded backbone
B
adenine-thymine base pair
C
sugar-phosphate groups
D
hydrogen-bonded pairs
10) Which nitrogen base is only found in an DNA nucleotide?
A
adenine
B
thymine
C
uracil
D
guanine
11) Which is a correct example of the base-pairing rule within the Watson-Crick double-helix model of DNA?
A
Cytosine-thymine
B
Guanine-adenine
C
Thymine-guanine
D
Adenine-thymine
12) Who received credit for the discovery of the double helix structure of DNA in 1953?
A
James Watson and Francis Crick
B
Robert Hooke
C
Gregor Mendel
D
Linus Pauling
13) How do the functions of DNA and RNA differ?
A
DNA directs protein transport, while RNA aids in energy production
B
DNA stores genetic information, while RNA relays genetic information for protein synthesis
C
DNA relays genetic information for protein synthesis, while RNA stores genetic information
D
DNA aids in energy production, while RNA directs protein transport
14) What are the building blocks of proteins?
A
Nucleotides
B
Amino acids
C
Hydrogen bonds
D
Ribosomes
15) This is the process where DNA is being copied.
A
DNA Replication
B
Transcription
C
None of the above
D
Translation
16) What kind of molecule carries amino acids to the ribosome, where they are joined with the codon in the process of translation?
A
mRNA
B
tRNA
C
rRNA
D
protein
17) Protein synthesis occurs in the -
A
Golgi body
B
Nucleus
C
Chloroplasts
D
Ribosomes
18) The type of mutation in which part of a chromosome is reversed in direction is called -
A
Deletion
B
Inversion
C
Translocation
D
Duplication
19) What is a mutation?
A
Only changes in an organism that results in harm to the organism
B
All changes in an organism that decreases the chance for survival
C
Any changes in the genetic material of an organism
D
Only changes in an organism that changes the way an organism behaves
20) When a mutation occurs and part of the DNA is deleted, it is a -
A
Deletion
B
Frameshift
C
Insertion
D
Inversion
*select an answer for all questions
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