Cell Biology MCQs

Cell Biology MCQs

Answer these 500+ Cell Biology MCQs and assess your grip on the subject of Cell Biology. Scroll below and get started!

1: _____ are the subunits of nucleic acids, and _____ are the subunits of proteins.

A.   Polypeptides; sugars

B.   Nucleotides; amino acids

C.   Bases; polypeptides

D.   Nucleoli; amino acids

2: _____ has a longer wavelength than _____

A.   Red, green

B.   Green, red

C.   Red, blue

D.   Blue, red

3: _____ transport blood to capillaries, and _____ transport blood away from capillaries.

A.   Arterioles ... venules

B.   Into the right atrium

C.   Arterial pressure during heart contraction ... arterial pressure during heart relaxation

D.   Liters of blood pumped per minute

4: ___________ exhibit lower electron affinity.

A.   Lower electron affinity

B.   Greater electron affinity

C.   Greater oxygen-binding ability

D.   Lower oxygen-binding ability

5: ________ectomy means the removal of the thymus gland.

A.   Inter

B.   Thym

C.   Lymph

D.   Spleno

6: A duplicated chromosome has _____ chromatid(s).

A.   2

B.   3

C.   1

D.   4

7: A karyotype is a __________.

A.   A photograph of all the chromosomes in a single cell from an individual

B.   Asexual reproduction and mitosis

C.   Division of the cytoplasm to create two cells

D.   Physically connects homologous chromosomes during prophase I

8: A meiotic division produces _____ daughter cells.

A.   1

B.   2

C.   4

D.   5

9: A plant performing photosynthesis will produce ____ and consume _____.

A.   Water, carbon dioxide.

B.   Oxygen, water.

C.   Oxygen, carbon dioxide.

D.   Carbon dioxide, oxygen.

E.   Carbon dioxide, water.

10: A sarcomere is ________.

A.   The nonfunctional unit of skeletal muscle

B.   The area between two Z discs

C.   The area between two intercalated discs

D.   The wavy lines on the cell seen in the microscope

11: A small amount of atp is made in glycolysis _____.

A.   By the transfer of a phosphate group from a fragment of the glucose to ADP (Substrate-level phosphorylation)

B.   Substrate-level phosphorylation

C.   Mitochondria

D.   Mitochondrial matrix

12: A triploid individual _____.

A.   Has an additional stage in meiosis (meiosis I, meiosis II, and meiosis III)

B.   Is unable to undergo mitosis

C.   Is unable to undergo normal meiosis

D.   Produces offspring with an even number of chromosome sets (for example, tetraploid, hexaploid)

13: Adult humans cannot synthesize _____ out of the _____ common amino acids.

A.   Cristae

B.   Nine; twenty

C.   Outer membrane

D.   Intermembrane space

14: Aerobic metabolism always requires _____

A.   Oxygen

B.   Water

C.   Cytosol

D.   ATP

15: Allelic variation is an important source of __________ in a population.

A.   Multiplication of body cells

B.   Genetic diversity

C.   Four haploid cells

D.   Genetic diversityasexual reproduction and mitosis

16: An enzyme _____

A.   Is an organic catalyst

B.   Is a source of energy for endergonic reactions

C.   Is a inorganic catalyst

D.   Increases the EA of a reaction

E.   Can bind to nearly any molecule

17: Asexual reproduction occurs during _____.

A.   Fertilization

B.   Mitosis

C.   Chromosome exchange between organisms of different species

D.   Meiosis

18: At a chiasma, two ________ are attached to each other.

A.   Homologous or sister chromatids

B.   Nonhomologous chromosomes

C.   Daughter cells

D.   Homologous or nonsister chromatids

19: Atp is a good energy currency for cells because it has a(n) _____ amount of gibbs free energy.

A.   Positive

B.   Chemical

C.   Negative

D.   Intermediate

E.   Substrate

20: Bone and blood cells are considered _____

A.   Protoplasm

B.   Cytoplasm

C.   A plasma membrane

D.   Bright-field microscope

E.   Specialized cells

21: Cadherins are __________.

A.   Developmental fate of each embryonic cell is determined very early

B.   Retain the capacity to develop into a complete embryo

C.   Evolution of the Hox gene complex provided developmental flexibility.

D.   Proteins that play key roles in how animal cells attach to one another

22: Cam plants conserve water by ________.

A.   Incorporating CO2 into RuBP

B.   Running the Calvin cycle at night

C.   Growing very deep roots

D.   Keeping their stomata closed at night

E.   Opening their stomata only at night

23: Carbon dioxide functions as a greenhouse gas because it _____.

A.   Traps heat that has been radiated from Earth similar to the way the glass of a greenhouse traps heat

B.   The absorption of carbon dioxide by plants and the ocean increases

C.   Decomposition of detritus

D.   The concentration of toxin can more than double at each level of the food chain.

24: Cellular respiration is a series of _____ reactions.

A.   Catabolic

B.   Metabolic

C.   Anabolism

D.   All of these

25: Chloroplasts are to ____________ as ___________ are to aerobic respiration

A.   Stroma, cristae

B.   Photosynthesis, mitochondria

C.   Thylakoid membranes, matrix

D.   Protein synthesis, lysosomes

26: Chromatids are __________.

A.   Identical copies of each other if they are part of the same chromosome

B.   The sister chromatids are pulled apart toward opposite sides of the cell.

C.   Cells of benign tumors do not metastasize; those of malignant tumors do

D.   Regulate the cell cycle through a variety of stop and go signals

27: Clusters of chlorophyll and accessory pigments are called ________.

A.   The Golgi apparatus

B.   Chloroplasts

C.   Photosystems

D.   Photosynthetic

28: Compared to c3 plants, c4 plants _____.

A.   They can fix carbon at the lower CO2 concentrations that develop when the stomata are closed

B.   Can continue to fix CO2 even at lower CO2 concentrations and higher oxygen concentrations

C.   The Calvin cycle has three phases: carbon fixation, reduction, and regeneration of RuBP.

D.   Plants are classified as producers because they fix inorganic carbon into organic molecules.

29: Cytokinesis refers to __________

A.   The mitotic spindle breaks down.

B.   Division of the cytoplasm

C.   Separation of the sister chromatids

D.   Identical copies of each other if they are part of the same chromosome

30: Denitrifying bacteria convert _____ to _____

A.   Ammonium ... nitrogen gas

B.   Nitrates ... nitrogen gas

C.   Nitrogen gas ... nitrites

D.   Nitrogen gas ... ammonium

31: Dna is replicated during the __________ subphase of interphase of the cell cycle.

A.   Telophase

B.   Prophase

C.   Interphase

D.   Anaphase

32: Duplication of the chromosomes to produce sister chromatids _____.

A.   Haploid gametes ... diploid zygote

B.   Occurs in both mitosis and meiosis

C.   They can activate and inactivate certain genes.

D.   The mitotic spindle would not form.

33: During _____ sister chromatids separate.

A.   Prophase II

B.   Diploid

C.   Anaphase I

D.   Anaphase II

E.   Prophase I

34: During cellular respiration ____.

A.   Glucose is oxidized and there is net production of ATP

B.   Glucose is oxidized and there is net hydrolysis of ATP

C.   Glucose is reduced and there is net hydrolysis of ATP

D.   Glucose is reduced and there is net production of ATP

35: During meiosis, the processes of __________ and __________ increase genetic diversity.

A.   Anaphase II

B.   Anaphase

C.   Homologous

D.   Crossing over, independent assortment

36: During metaphase i ______

A.   Have two nuclei

B.   Chromosomes line up in the middle of the cell

C.   Seek early detection of tumors

D.   Prophase, metaphase, anaphase, telophase (PMAT)

37: During photosynthesis in plants and algae, _____ is oxidized and _____ is reduced.

A.   H2O, CO2

B.   H8O, CO2

C.   H2O, CO98

D.   H2O, CO102

38: During photosynthesis, _____ is reduced to _____.

A.   Carbon dioxide; oxygen

B.   Sugar; oxygen

C.   Oxygen; water

D.   Carbon dioxide; sugar

E.   Water; carbon dioxide

39: During redox reactions ______

A.   The loss of electrons from one substance is called reduction

B.   Electrons are lost from one substance and added to another substance

C.   Protons from one molecule replace the electrons lost from another molecule

D.   A substance that gains electrons is said to be oxidized

E.   None of the above

40: During the calvin cycle, carbon dioxide is _____ to drive the formation of sugars

A.   Oxidized

B.   Recycled

C.   Reduced

D.   Produced

41: Ecosystem productivity is principally limited by _______

A.   Sunlight and nutrient availability

B.   Water and nutrient availability

C.   The availability of time and nutrients

D.   None of the above

42: Energy is captured for photosynthesis by _____ molecules.

A.   ATP

B.   Glucose

C.   Cristae

D.   Chlorophyll

43: Energy is used, converting ____________ to adp.

A.   ATP

B.   ADP

C.   Both

D.   None of these

44: Eukaryotes are ________ prokaryotes.

A.   Peptidoglycan.

B.   Dependent upon

C.   Brown alga.

D.   Actinomycetes

E.   Methanogens

45: Fad, nad, and coenzyme a are all _____ carriers.

A.   Hydrogen

B.   Electron

C.   ATP

D.   Hydrogen and electron

E.   None of the choices is correct.

46: Fatty acids are ________; they function in the cell as ________.

A.   Short chains of double-bonded carbon molecules; vitamins, cofactors, and storage

B.   Long, unbranched hydrocarbon chains with a carboxyl group at one end; building

C.   Four-ringed hydrocarbon molecules; key components of membranes

D.   Short chains of double-bonded carbon molecules; storage lipids

E.   Short chains of double-bonded carbon molecules; vitamins and cofactors

47: Fermentation pathways have the __________ in common.

A.   Oxidation of NADH to NAD+

B.   Production of ethanol

C.   Production of lactic acid

D.   Use of oxygen as an electron acceptor

48: Following mitosis and cytokinesis, daughter cells are __________.

A.   Ensure that cancer does not occur.

B.   Genetically identical to the parent cell

C.   No, because the cancerous cells have spread throughout the body.

D.   Intestinal tract and skin cell replacement.

49: For a species with four pairs of chromosomes, ________ chromosome combinations are possible.

A.   4

B.   8

C.   16

D.   20

50: For each glucose that enters glycolysis, _____ nadh + h+ are produced by the citric acid cycle.

A.   8

B.   4

C.   6

D.   5