Basic concepts: cell structure and functions, diffusion, permeability, energy, enzymes, cell division, cell cycle, mitosis, meiosis, caner, chromosomes, DNA and RNA replication / translation / transcription, mutations, genetic diseases, inheritance, molecular genetics, proteins, amino acids, polymers, etc.

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Biology 205 (BIOL 205-UCAL) Final Exam

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Question 1

Which of the following best describe a testcross? (ID-BIF-59)

A	Cross between two F1 hybrids.
B	Cross between a F1 hybrid and the homozygous dominant parent.
C	Cross between a F1 hybrid and a heterozygous organism.
D	Cross between two parental organisms.
E	Cross between a F1 hybrid and an organism that is homozygous recessive for that trait.

Question 2

The theory of segregation... (ID-BIF-71)

A	applies only to linked genes.
B	...deals with the alleles governing two different traits.
C	...applies only to sex-linked genes.
D	...explains the behavior of a pair of alleles during meiosis.

Question 3

If A is dominant to a and B is dominant to b, what is the expected phenotypic ratio of the cross AaBb _ AaBb? (ID-BIF-22)

A	1:3:3:2
B	1:1:1:1
C	9:3:3:1
D	8:4:2:2
E	16:0:0:0

Question 4

What type of cell division do the prokaryotes undergo? (ID-BIF-04)

A	replication
B	binary fission
C	mitosis
D	meiosis

Question 5

According the Mendelian genetics, which of the following statement(s) on characters and traits are correct? (ID-BIF-57)

I. Colour of human skin is a character.
II. Green colour of peas as opposed to yellow is a trait.
III. Tall trees as opposed to short trees is a character.
IV. Shape of brain is a character.

A	I and III only.
B	I, II and IV only.
C	I, II and III only.
D	All four statements are correct.
E	II and IV only.
F	II and III only.

Question 6

Large solid molecules are transported across cell membrane through what process? (ID-BIF-19)

A	Receptor-neduated endocytosis
B	Active diffusion
C	Phagacytosis
D	Facilitated diffusion
E	Pinocytosis

Question 7

What do you call a chromosome that is not involved in sex determination? (ID-BIF-74)

A	Heterosomes
B	Alleles
C	Autosomes
D	Nucleosomes
E	Genomes

Question 8

Chromosomes made of what biological materials? (ID-BIF-01)

A	DNA and Proteins
B	RNA
C	DNA and RNA
D	Proteins
E	DNA

Question 9

Which of the following features would characterize a lytic cycle of a viral infection? (ID-BIF-45)

A	The cycle typically leads to the lysis of the host cell.
B	The virus reproduces outside of the host cell.
C	The viral DNA is inserted into a bacterial chromosome.
D	The cycle typically ends when the host bacterium divides.
E	The viral genes typically remain inactive once they are inside the host cell.

Question 10

Tetracycline is a broad-spectrum antibiotic that binds to the 30S ribosomal subunit and inhibits translation by preventing the binding of tRNA. What is the direct effect of tetracycline? (ID-BIF-52)

A	Prevention of translation.
B	Prevention of transcription.
C	Prevention of the nucleic acid formation.
D	Interruption of phospholipid synthesis.
E	Interruption of DNA replication.

Question 11

What does transformation involve in bacteria? (ID-BIF-70)

A	The creation of a strand of RNA from a DNA molecule.
B	The creation of a strand of DNA from an RNA molecule.
C	The infection of cells by a phage DNA molecule.
D	Assimilation of external DNA into a cell.
E	The type of semiconservative replication shown by DNA.

Question 12

An enzyme inhibitor process in which an excessive amount of the product will result in suppression of the starting reaction is known as... (ID-BIF-68)

A	...competitive inhibitor.
B	...feedback inhibitor.
C	...noncompetitive inhibitor.
D	...product inhibitor.
E	...reactant inhibitor.

Question 13

How much time a cell would typically spend in the M phase of cell division? (ID-BIF-05)

A	About 90% of the total time of the cell cycle.
B	About 35% of the total time of the cell cycle.
C	About 50% of the total time of the cell cycle.
D	About 10% of the total time of the cell cycle.

Question 14

At what stage of the mitosis process the nuclear envelope breaks down? (ID-BIF-08)

A	Anaphase
B	Prophase
C	Telophase
D	Prometaphase
E	Metaphase

Question 15

In tRNA where does the anticodon structure located? (ID-BIF-42)

A	Outside but exposed within the ribosome.
B	Deep inside the tRNA structure.
C	Outside sticking out of the ribosome.
D	At the amino acid attachment site of tRNA.

Question 16

Which of the following statement is correct about gene regulation? (ID-BIF-32)

A	It is a laboratory process used in in vitro fertilization.
B	It is the process in which the speed of the cell division is controlled by several genetic factors.
C	It is the process in which genes are turned "on" and "off" as a response to stimuli.
D	It is a laboratory process used for production of genetically modified foods.

Question 17

Prior to mitosis, each chromosome of a eukaryotic cell consists of a pair of identical structures called... (ID-BIF-13)

A	...homolgous chromosomes.
B	...sister chromatids.
C	...DNA transcripts.
D	...sister chromosomes.
E	...chromatin.

Question 18

The attachment of a chromosomal fragment to a nonhomologous chromosome is... (ID-BIF-25)

A	...an inversion.
B	...a translocation.
C	...a deletion.
D	...a duplication.

Question 19

What factor(s) that affect the activity of an enzyme if anything but the optimal conditions? (ID-BIF-79)

A	pH, chemical balance and temperature
B	temperature and chemical balance
C	temperature only
D	pH and temperature
E	pH only

Question 20

In genetics, what is a locus (loci)? (ID-BIF-62)

A	A type of mutation within a chromosome caused by an unmatched allele.
B	A region where the end codon is located.
C	A site in which a particular gene is located in the chromosome.
D	The region of a duplicated chromosomes where two sister chromatids are joined.
E	A region where the start codon is located.

Question 21

Which of the following indicates homozygous genotypes? (ID-BIF-63)

A	aa
B	Aa
C	AA
D	AA and Aa
E	AA and aa

Question 22

If the solute concentration outside the cell is lower than that of the inside, it is known as a ____ condition. (ID-BIF-10)

A	isotonic
B	diffusion
C	hypotonic
D	hypertonic
E	non-equilibrium

Question 23

Which of the following mechanisms of controlling gene expression occurs outside of the nucleus? (ID-BIF-12)

A	Translation
B	RNA splicing
C	DNA packing/unpacking
D	Transcription
E	Adding a cap and tail to RNA

Question 24

In his experiments with plants, Mendel removed which part of the plant to prevent unwanted fertilizations? (ID-BIF-61)

A	Petals
B	Stamens
C	Stigmas
D	Flowers
E	Pistils

Question 25

During which phase the nuclear envelope fragments and the nucleoli disappear in mitosis? (ID-BIF-14)

A	Prophase
B	Anaphase
C	Interphase
D	Prometaphase
E	Metaphase

Question 26

What nucleotide sequence would be found on the partner DNA strand, A-G-T-C-T-G-C? (ID-BIF-20)

A	G-T-A-G-A-C-T
B	T-C-A-G-A-C-G
C	T-A-G-A-T-C-G
D	G-A-T-C-A-C-A
E	T-G-T-G-T-A-G

Question 26 Explanation:

Remember, A - T and C - G.

Question 27

In most plants and animal genes, the non-cording region is known as... (ID-BIF-40)

A	...intron.
B	...loci.
C	...exon.
D	...centromere.
E	...splicer.

Question 28

Translation of RNA is performed by what structure? (ID-BIF-54)

A	Ribosomes
B	tRNAs
C	Codons and anticodons
D	Polypeptides

Question 29

Which of the following statement is correct about the diffusion chemical equilibrium? (ID-BIF-09)

A	The diffusion does not allow chemical equilibrium because particles will still be moved across through active transport.
B	At equilibrium, transport of particles ceased and there is no net change in concentration.
C	At equilibrium, transport still occurs but there is no net change in concentration.
D	Even at equilibrium, there is a net diffusion direction but this is balanced by other sources of input into the cell.

Question 30

Genetic diversity increased at a faster rate with ___ than with ___. (ID-BIF-03)

A	natural gene evolution , genetic mutations
B	asexual reproduction , sexual reproduction
C	genetic mutations , natural gene evolution
D	mitosis cell division , meiosis cell division
E	sexual reproduction , asexual reproduction

Question 30 Explanation:

Note the genetic mutations can actually reduce the genetic diversity.

Question 31

Which of the following occurs when RNA polymerase attaches to the promoter DNA? (ID-BIF-21)

A	Initiation of a new polypeptide chain.
B	Termination of the RNA molecule.
C	Elongation of the growing RNA molecule.
D	Initiation of a new RNA molecule.

Question 32

The __I__ pathways consumes energy to build complex molecules while __II__ pathways releases energy by breaking down complex molecules into smaller, simpler compounds. (ID-BIF-77)

A	I. catabolic II. anabolic
B	I. metabolic II. anabolic
C	I. metabolic II. catabolic
D	I. anabolic II. catabolic
E	I. anabolic II. metabolic
F	I. catabolic II. metabolic

Question 33

During which phase of mitosis the sister chromatids separates and become daughter chromosomes? (ID-BIF-27)

A	Prophase
B	Interphase
C	Telophase
D	Metaphase
E	Anaphase

Question 34

In DNA and RNDA, the nitrogenous bases are attached to what structure? (ID-BIF-39)

A	Amino acid and protein sequences
B	Nucleotides and polynucleotides framework
C	Sugar-phosphate backbone
D	Complementary RNA strand

Question 35

Which of the following bond breaks down in ATP in order to release energy? (ID-BIF-26)

Credit: http://commons.wikimedia.org/ wiki/File:ATP_chemical_structure.png

A	IV
B	I
C	III
D	II

Question 36

In genetics, what is a promoter? (ID-BIF-41)

A	A transcription enzyme within the RNA structure that allow it to obtain information from the nucleus.
B	A transcription enzyme within the RNA structure that allow it to pass information to proteins.
C	A specific binding site for sigma factor in DNA which the RNA can bind.
D	A protein which can attached to RNA to produce complementary DNA strand.
E	A protein which encourages DNA replication by stimulating the DNA.

Question 37

Strictly speaking, the phrase "like begets like" refers to... (ID-BIF-11)

A	...sexual reproduction only.
B	... all forms of reproduction.
C	...sexual reproduction between different species.
D	...asexual reproduction only.

Question 38

The crossing over regions between nonsister chromatids of homologous chromosomes are known as... (ID-BIF-33)

A	...chiasmas.
B	...tetrads.
C	...recombs.
D	...loci.

Question 39

Which of the following statements is true? (ID-BIF-60)

A	The explanation for genetics had no implications for evolution.
B	Darwin did not know which mechanisms were responsible for the variation he saw.
C	Darwin did not know that mechanisms that causes genetic variations in plants are similar to that of animals.
D	The blending theory of inheritance provides support for evolution.
E	Darwin received Mendel's paper but did not understand its significance.

Question 40

Enthropy increased with... (ID-BIF-78)

A	...decrease in collisions among atoms.
B	...released of energy.
C	...decreased in in energy.
D	...increased in in energy.

Question 41

Substrates bind to an enzyme’s ________ site. (ID-BIF-16)

A	phosphate
B	inhibitory
C	active
D	allosteric

Question 42

Which of the following statement is false about antibiotics? (ID-BIF-55)

A	Antibiotics not only can be used as a preventive medication, but also can be used to treat existing infections.
B	Excessive use of antibiotics will create drug resistant bacteria also known as superbugs.
C	Antibiotics work by either killing or inhibiting the growth of undesirable bacteria.
D	Penicillin antibiotic is derived from a fungi and belongs to β-Lactam antibiotics class.

Question 42 Explanation:

The use of antibiotic only increase the frequency of drug resistance bacteria that were already present in bacterial population. It cannot "create" a drug resistant bacteria.

Question 43

DNA damage caused by UV radiation result in thymine dimer. This can be repaired by a processed called ___ which detects the distortion in the DNA structure. (ID-BIF-56)

A	DNA polymer repair
B	nucleic acid bond repair
C	DNA ligase repair
D	nucleotide excision repair
E	thymine insertion repair

Question 44

What is the primary compound or structure that controls the movement of daughter chromosomes during cell division? (ID-BIF-31)

A	Size and type of the chromosome.
B	Type of ATP compound that assist in the movement.
C	Shape of the mitotic spindle.
D	The location of the centrosomes.

Question 45

An individual with a genotype of Aa Bb CC is able to produce how many different kinds of gametes? (ID-BIF-72)

A	Eight
B	Four
C	Seven
D	Three
E	Two

Question 46

The directions for each amino acid in a polypeptide are indicated by a codon that consists of _____ nucleotide(s) in an RNA molecule. (ID-BIF-44)

A	two
B	one
C	five
D	four
E	three

Question 46 Explanation:

Eg. UAC-AUG start codon.

Question 47

Which of the following kinds of data could be used to map the relative position of three genes on a chromosome? (ID-BIF-24)

A	The frequencies with which the genes exhibit incomplete dominance over each other.
B	The frequencies of mutations in the genes.
C	The frequencies with which the genes are inherited from the mother and from the father.
D	The frequencies with which the corresponding traits occur together in offspring.

Question 48

What does tRNA transport? (ID-BIF-43)

A	DNA
B	Nucleotides
C	Polymers
D	Nucleic acids
E	Amino acids

Question 49

What is the best genetic descriptor for an X-linked carrier? (ID-BIF-75)

A	Homozygous recessive female
B	Homozygous dominant female
C	Heterozygous female
D	Homozygous male
E	Heterozygous male

Question 50

Place the following steps of polypeptide formation in proper order. (ID-BIF-51)

I. Translocation
II. Renegotiation of the start codon.
III. Codon recognition by pairing tRNA anticodon with mRNA codon.
IV. Peptide bond formation.

A	II (first) --> III --> IV --> I (last)
B	II (first) --> III --> II--> IV (last)
C	III (first) --> III --> IV --> I (last)
D	III (first) --> II --> I--> IV (last)

Question 51

Mitosis is composed of how many stages? (ID-BIF-06)

A	4
B	3
C	2
D	5

Question 52

Scientists working for NASA found an organism on Mars. After analyzing the DNA structure, they found the organization contains 60 chromosomes. Assuming the exact same process of mitosis occur on Martian life as our humans, what is the expected number of chromosomes in the Martian gametes? (ID-BIF-34)

A	30
B	10
C	6
D	60

Question 53

If a cell has three different amino acids, four different sugars, and two different ions, how many different proteins does the cell need to move these molecules across the plasma membrane using facilitated transport? (ID-BIF-48)

A	Nine
B	One
C	Four
D	Three
E	Two

Question 54

A human lost at sea without fresh drinking water. He/she started to drink salt water as a substitute to fresh water. Why is drinking salt water harmful? (ID-BIF-50)

A	It creates a hypotonic condition in which the cells lose water.
B	It leads to lysed condition which eventually caused the bursting of the cell membrane.
C	It creates a hypertonic condition in which the cells lose water.
D	It leads to isotonic situation where cells could not obtain nutrients from outside and could not remove waste to outside.

Question 55

An abnormalities in ATP production will most likely result in... (ID-BIF-18)

A	...destruction of the cell.
B	...destruction of the nucleus.
C	...reduction in RNA replication.
D	...reduction in protein synthesis.

Question 56

Hybrid organisms produced from a cross between two pure-breeding organisms belong to which generation? (ID-BIF-64)

A	F2 generation
B	P1 generation
C	A1 generation
D	F1 generation
E	P2 generation
F	H1 generation

Question 57

What is the best definition for vaccine? (ID-BIF-37)

A	A lead-based compound used in medical substances usually added to host's blood stream that boost immune system.
B	A synthetic virus used for infecting the host organism in order to prevent more dangerous strain of the virus from infecting the host.
C	A genetically modified version of the the virus used to suppress the host organism's immune system.
D	A derivative of a pathogen used to simulate a host organism's immune system.

Question 58

Which of the following mutation will most likely have no adverse effect on the protein coded by the mutated gene? (ID-BIF-53)

A	Rearrangement of codons.
B	Nucleotide insertion.
C	Nucleotide substitution.
D	Nucleotide deletion.
E	Alteration of the start codon.

Question 59

What is the term given to describe the condition when an organism has a 2n + 1 chromosome composition? (ID-BIF-80)

A	Muted
B	Monosomy
C	Diploid
D	Haploid
E	Trisomy

Question 60

A situation where change in amino acid codon into a stop codon is most likely caused by what type of mutation? (ID-BIF-30)

A	Missense mutation
B	Reading frame mutation
C	Silent mutation
D	Nonsense mutation

Question 61

According to Mendel, what kind of genes "disappear" in F1 pea plants? (ID-BIF-65)

A	Dominant
B	Recessive
C	Lethal
D	Codominant
E	Sex-linked

Question 62

During which stage of meiosis do synapsis and crossing over occur? (ID-BIF-28)

A	Prophase II
B	Interphase I
C	Prophase I
D	Metaphase II
E	Metaphase I

Question 63

At what stage of the mitosis process do the chromatids align in the center of the cell forming a plate like structure? (ID-BIF-07)

A	Prophase
B	Metaphase
C	Prometaphase
D	Anaphase
E	Telophase

Question 64

What enzyme catalyzes the elongation of a new DNA strand? (ID-BIF-47)

A	DNA polymerase
B	DNA Pectinase
C	DNA thymine
D	DNA ligase
E	DNA Invertase

Question 65

Consider to following sentence: "The dog did not eat." Which one of the following variations of this sentence is most like a reading frame mutation? (ID-BIF-46)

A	The dod idn ote at.
B	The did not eat.
C	The dog did dog did not eat.
D	The did dog not eat.
E	The dog dog did not eat.

Question 66

What is a monohybrid cross? (ID-BIF-58)

A	A cross between individuals with different P-generations.
B	A cross between individuals that are identical. In other words, no difference between any charter.
C	A cross between individuals that only differ due to one F-generation.
D	A cross between individuals that only differ in one character.
E	A cross between individuals from the same species.

Question 67

Which of the following statements about the the reaction A = B + C + heat is true? (ID-BIF-17)

A	The potential energy of the products is less than that of the reactant.
B	The reaction is an endothermic reaction.
C	The potential energy of the products is more than that of the reactant.
D	The reaction require a catalyst such as an enzyme to proceed.

Question 68

Which of the of the following statements is correct on chromosome theory of inheritance? (ID-BIF-29)

A	Chromosomes themselves do not control the patterns of inheritance.
B	Chromosomes undergo segregation and independent assortment.
C	Chromosomes undergo segregation and but do not independent assortment.
D	Only few selected chromosomes are responsible for inheritance.

Question 69

Transfer of a phosphate group from ATP to another molecule is known as... (ID-BIF-76)

A	Polymerization
B	Hydrolysis
C	Energization
D	Phosphorylation

Question 70

If tall (D) is dominant to dwarf (d), and two homozygous varieties DD and dd are crossed, then what kind of offspring will be produced? (ID-BIF-66)

A	All DD
B	All Dd
C	1/2 Dd, 1/2 dd
D	1/2 DD, 1/2 Dd
E	All dd

Question 71

Which of the following substances would have the most trouble crossing a biological membrane by diffusing through the lipid bilayer? (ID-BIF-15)

A	Carbon dioxide
B	Oxygen
C	Positivity charged sodium ion.
D	A small, nonpolar molecule such as butane (C₄H₁₀).

Question 72

In Mendel's time, which of the following is a popular belief? (ID-BIF-69)

A	Only certain forms of domesticated plants and animals bred true.
B	The characteristics of parents were blended in the offspring.
C	All genetic traits bred true.
D	The inheritance of traits was controlled by blood.
E	Acquired characteristics were inherited.

Question 73

How did the Scientists Hershey-Chase discovered that DNA as the primary genetic material? (ID-BIF-38)

A	They observed the nucleus under high powered microscopes and discovered that the DNA is much larger than proteins.
B	They were able to identify nucleotides which provided the proof needed to show that DNA is the genetic material.
C	They injected different radioactive isotopes label DNA and protein then trace it using phage.
D	They separated the DNA from the rest of the cell structure using centrifuged mixture and discovered DNA is the only living material.

Question 74

Sex-linked conditions are more common in men than in women because... (ID-BIF-23)

A	...the genes associated with the sex-linked conditions are linked to the Y chromosome, which determines maleness.
B	...the sex chromosomes are more active in men than in women.
C	...men acquire two copies of the defective gene during fertilization.
D	...men need to inherit only one copy of the recessive allele for the condition to be fully expressed.

Question 75

What is the genetic property in which a single gene controls several phenotype characters? (ID-BIF-36)

A	Polygenetic inheritance
B	Promoter
C	Monogenetic inheritance
D	Pleiotropy
E	Achondroplasia

Question 76

Which of the following statement is correct about reproduction? (ID-BIF-02)

A	Both plants and animals can produce offspring through sexual reproduction.
B	Only the organisms in the Kingdom Animalia undergo sexual reproduction.
C	Early plants sexually reproduced their offspring.
D	Early humans asexually reproduced their offspring.
E	Multicultural organisms only reproduce through sexual reproduction and are not capable of asexual reproduction.

Question 77

The condition in which the water enters and leaves the cell at an equal rate is known as... (ID-BIF-49)

A	...static.
B	...isotonic.
C	...hypotonic.
D	...hydrotonic.
E	...hypertonic.

Question 78

What is energy coupling? (ID-BIF-67)

A	Use of two ATPs to drive a single reaction.
B	Use of two phosphates from ATP to drive a single reaction.
C	Use of energy released from exergonic reactions to drive endergonic reactions.
D	Breaking down of molecules to obtain energy from both ATP and ADP.

Question 79

Multiple effects of a single gene is known as... (ID-BIF-73)

A	...multiple alleles.
B	...expressivity.
C	...pleiotropy.
D	...codominance.
E	...penetrance.

Question 80

What would be the most likely cause for high rate of cystic fibrosis (CF) among people in the isolated region, Saguenay-Lac-Saint-Jean, Quebec? (ID-BIF-35)

A	Increased in genetic diversity.
B	Genetic mutations caused by external factors.
C	Naturally occurring genetic mutations.
D	Inbreeding

Question 80 Explanation:

This is an example used in the textbook for inbreeding. When a student reads "isolated region" in the question, the answer should be obvious.

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Credits: Based on the excellent class notes provided by, Dr. Lohmeier-Vogel during Fall 2014. Additional study material: Ch. 5, 8, 9, 10 Campbell Biology ISBN-10: 1-269-98476-4.
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Biology 205 (BIOL 205-UCAL) Final Exam

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Standing on the shoulders of giants