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Tag: Biological Sciences Important Mcqs for Commissions Exam

Biological Sciences Important Mcqs for Commissions Exam

Biological Sciences Important Mcqs For Commissions Exam

1. Cells are taken from a person with Down’s Syndrome. The chromosomes of the cell are stained and a photograph is taken using a microscope. Then the chromosomes are carefully cut out of the photograph with scissors, pairs are established according to their banding patterns, and the pairs are organized according to size. The resulting photomicrograph is best described as a
Karyotype
phenotype
genotype
blood type
DNA type

2. Which of the following processes requires the involvement of intermediary protein-DNA complexes such as RecA ?
Fermentation
Genetic recombination
Genetic drift
Non-random mating
Natural selection

3. The following are a category of genetic mutations EXCEPT
Insertion
Frame shift
Deletion
Point mutation
Translation

4. The bonding of glycine and alanine to form glycylalanine requires the following:
the release of a water molecule
the release of a carbon dioxide molecule
the addition of a nitrogen atom
the addition of a water molecule
an increase in activation energy

5. Meiosis not only preserves the genome size of sexually reproducing eukaryotes but also provides mechanisms to diversify the genomes of the offspring. One of these mechanisms involves a crossover between the non-sister chromatids of two, homologous chromosomes. This process occurs in the following phase of meiosis:
prophase
metaphase
telophase
early anaphase
later anaphase

6. During the winter newly developing leaves growing above the meristem become converted into stiff bud scales that wrap the meristem closely and will protect it from mechanical damage and drying out during the winter. The plant hormone mainly responsible for this action is :
Cytokinin
Systemin
Gibberellin
Ethylene
Abscisic Acid

7. Photoautotrophs use light to synthesize organic molecules from inorganic raw materials. Which of the following is NOT a photoautotroph?
ferns
purple sulphur bacteria
archaea
algae
mosses

8. The largest compartment of most mature cells is the vacuole. The size of the vacuole increases as the cell ages and usually reaches up to 90% of the total cell volume. The main reason for this increase in size is
vacuoles need to store glycogen in mature cells
vacuoles accumulate cell organelles in mature cells
cytoplasm diffuses into the vacuole in mature cells
smaller vacuoles coalesce to form a larger vacuole
vacuoles accumulate mitochondria with age

9. Antisense RNAs are small, diffusible untranslated RNAs that pair to complementary regions on specific target mRNAs. This pairing results in changes in the expression or function of the target mRNAs post-transcriptionally. The function of antisense RNA is most likely to:
Block translation
Increase rate of translation
Mutate genes
Aid delivery of amino acids to transcription site
Aid in polysome formation

10. An experiment is held to determine the affect of various inorganic ions on plant growth. Plants are placed into different liquids (solutions). Each liquid contained an almost balanced mixture of elements, but each solution lacked one specific element, these being nitrogen, phosphorus, potassium and magnesium. What should be added to each solution to make the experiment successful?
Growth Hormone
Trace elements
Mineral water
Fertilizers
Phytochemicals

11. In the lac operon model, lactose reacts with the lac repressor allowing the RNA polymerase to attach to the operon. In this situation, lactose is known as the
Operator
Inducer
Regulator
Repressor
Corepressor

12. A mother notes that her baby needs to be fed approximately every four hours as otherwise it will start crying incessantly, even at night. Which of the following best expresses this behaviour?
Circadian
Infardian
Ultradian
Circannual
Avidity

13. Eggs from a grey lag goose were placed in an incubator and the first moving object the hatchlings encountered was a duck. They responded to the duck as they would to their own mother following it around wherever it went. This is an example of:
Imprinting
Observational learning
Associative learning
Habituation
Operant conditioning

14. It is noted that a prokaryote has high RNA polymerase activity. This could mean that the cell has:
A low glucose level
A low cAMP level
Low lactose levels
High glucose levels
Low CAP levels

15. Occasionally during transcription, a single base is substituted on the mRNA strand. This is an example of a
Genetic drift
Frame shift
Point mutation
Nonsense mutation
Spontaneous mutation

16. Animals that are heterotrophs must break down the organic molecules in their food to intake nutrients. Earthworms and termites, eat the material (dirt or wood) they burrow through. Earthworms are known as:
Absorptive feeders
Filter feeders
Filter feeders
Ingestive feeders
Fluid feeders

17. Plants need nitrogen for many important biological molecules including nucleotides and proteins. However, the nitrogen in the atmosphere is not in a form that plants can utilize. Many plants actually have root nodules to host nitrogen fixing bacteria and be able to absorb nitrogen from the surroundings. This relationship is best described as
Symbiotic
Mutualistic
Parasitic
Commensal
Agonistic

1. Menstrual cycle can be divided in:
Five phase
Three phase
Four phase
Two phase
None of them

2. Test tube baby fertilization takes place in:
In vivo
In uterus
In vitro
In vagina

3. Which of the following sexually remitted disease is caused by a gram positive bacterium?
Gonorrhea
Genital herpes
Syphilis
AIDS

4. Most plants have adapted to survive in heat stress by synthesizing large quantities of special proteins called:
Heat absorbing proteins
Heat shock proteins
Heat resistant proteins
Heat dissipating proteins

5. Marine mammals such as whales and seals inhabit cold water by having a very hick layer of insulating fat are called :
Pelagic
Blubber
Brown fat
All of above

6. An ethnologist is a scientist who studies:
Plant behavior
Human behavior
Animal behavior
All of above

7. Bryophytes are generally thought to have evolved from:
Green algae
Red algae
Brown algae
All of above

8. The products of photosynthetic light reactions are:
ATP and NADH
ATP and FADPH
ATP and NADPH
ATP and NAD

9. The total aggregate of genes in a population at any one time is called:
Polygene’s
Multiple alleles
Gene pool
All of above

10. If all members of a population are homozygous for the same allele, the allele is said to be:
Dominant allele
Fixed allele
Recessive allele
Multiple allele

11. The distribution of organisms in space can be studied through:
Biomes
Maps
Telescope
Ecological distribution

12. In sponges the skeleton is in the form of variously shaped needle like structure called:
Ostia
Spines
Operculum
Speckles

13. The asexual reproduction in sponges is by:
Fragmentation
Fission
Budding
All of above

14. Tape worm is an end parasite of :
Humans
Pig
Cattle
All of above

15. In arthropods the sensory organs are usually:
A pair of compound eyes
Antennae
A pair of compound eyes and antennae
A pair of legs

16. In arthropods the main tubes of tracheae open to the exterior through openings called:
Asculum
Spiracles
Tentacles
Ostia

17. The structure which is possessed by all members of the phylum chordate either in larval or embryonic stages or throughout life is:
Vertebral column
Notochord
Nerve cord
Gills

18. The adult members of sub phylum urochordata are sessile and enclosed in a covering called:
Mantle
Tunic
Epidermis
Tunica

19. The class cyclostomatous includes most primitive living vertebrates which are without:
Cartilage
Gills
Jaws
Operculum

20. Thylakoid membranes are involved in ATP formation by:
Oxidative phosphorylation
Chemiosmosis
Chemosynthesis
Osmosis

1. The term Biology is of:
Latin orgin
German orgin.
English orgin
Greek origin

2. The branch of Biology dealing with social behavior and communal life of human beings is:
Micro Biology
Human Biology
Bio technology
Social Biology

3. All the living and non-living matter are formed of:
A.M.P; A.T.P; A.D.P.
Cells and cell products.
Atoms and sub-atomic particles.
Organs and organelle

4. Deductive reasoning is always from:
Tentative to exact
General to specific
Qualitative to Quantitative
Specific to general

5. The plants having foreign D.N.A. in their cells are:
Induced plants.
Hydrophytic plants
Transgenic plants
Specific plants

6. AIDS is caused by:
D – virus
H.I.V.
H . virus
T.M.V.

7. Cloning is a technology for achieving:
Eugenic aims
Integrated aims
Scientific aims
Biology aims

8. Which of following is a viral disease:
Tetanus
Typhoid
Meningitis
Cow pox

9. The Integrated disease management involves:
Loss of microbes
Division of zygote
Extinction of species
Combating of disease

10. ___________ is the study of living creatures.
Microbiology
Marine Biology
Parasitology
Biology

11. Molecular Biology deals with the structure of organizations the cells and their organelleles at _____________ level.
Molecular
Macro
Microbiology
Biome

12. The study of micro organisms, such as Bacteria, Viruses etc. is called as ______________.
Molecular
Microbiology
Marine Biology
Macro

13. The study of living organisms in seas and oceans is called as ______________.
Marine Biology
Macro
Molecular
Microbiology

14. The study of Parasites, relating to their structure and mode of transmission is called as ____________.
Biology
Chemotherapy
Gene therapy
Parasitologist

15. In human body only ___________ Bio elements constitute 99% of the total mass.
Six
Vaccination
Cloning
Aids

16. Every organism is composed of numerous micre and ___________ molecules of hundreds of different type.
Microbiology
Marine Biology
Macro
Molecular

17. A group of organisms of the same species located in the same place at the same time is called as ___________.
Pasteurization
Parasitology
Population
Phyletic lineage

18. Population of different species of plants and Animals in the same habitat constitutes a __________.
Community
Six
Biome
Parasitology

19. A large regional community determined by climate is called as ____________.
Biome
Pasteurization
Chemotherapy
Biology

20. An unbroken series of species arranged in ancestor to the descendant order is called as ___________.
Phyletic lineage
Parasitology
Population
Community

1. A statement based upon observations and experience is called as _____________.
Gene therapy
Endangered Species
Hypothesis
Vaccination.

2. The manipulation of desired genes in plants and animals is called as ____________.
Senetic engineering
Vaccination.
Cloning
Chemotherapy

3. The production of genetically identical copies of organisms by Asexual reproduction is called as __________.
Biome
Phyletic lineage
Genetic engineering
Cloning

4. A technique involved in food preservation from spoilage by killing non-spore forming bacteria is called ____________.
Community
Parasitology
Phyletic lineage
Pasteurization

5. The disease ____________ refers to Acquired Immuno deficiency syndrome.
Hypothesis
Aids
Six
Phyletic lineage

6. A technique called ______________ refers to repair and isolation of defective genes by introducing normal genes through bone marrow.
Parasitology
Phyletic lineage
Microbiology
Gene therapy

7. The specious of plants and animals if not produced, likely to get extinct are called as ____________.
Genetic engineering
Pasteurization
Endangered Species
Aids

8. Radio therapy and ___________ are used to control cancer.
Parasitology
Community
Chemotherapy
Gene therapy

9. Edward jenner in 1795 developed a technique to control small pox called ____________ or shorts.
Vaccination
Macro
Biome
Cloning

10. Biosphere
Collection of tissues shape, a structure, that forms a functional unit.
It involves the removal of environmental pollutions by the living organisms
It involves the test to verify the significance of nutrients essential for their
Inoculation and vaccination is one of the techniques to avoid microbial ailments

11. Organ
Collection of tissues shape, a structure, that forms a functional unit.
It involves the test to verify the significance of nutrients essential for their
The part of earth inhabited Biologically and A biologically unit.
It involves the removal of environmental pollutions by the living organisms

12. Hydroponic culture technique
Collection of tissues shape, a structure, that forms a functional unit.
It involves the test to verify the significance of nutrients essential for their
The part of earth inhabited Biologically and A biologically unit.
It involves the removal of environmental pollutions by the living organisms

13. Immunization
Inoculation and vaccination is one of the techniques to avoid microbial ailments
Collection of tissues shape, a structure, that forms a functional unit.
The part of earth inhabited Biologically and A biologically unit.
It involves the test to verify the significance of nutrients essential for their

14. Bio remediation
Inoculation and vaccination is one of the techniques to avoid microbial ailments
The part of earth inhabited Biologically and A biologically unit.
Collection of tissues shape, a structure, that forms a functional unit.
It involves the removal of environmental pollutions by the living organisms

15. Radioactive Isotopes
Administrating anticancer chemicals to the parents after after regular interval
The hypothesis supported by the result of many tests.
Dating or age of rocks can by calculated.
One of the geological periods of Paleozoic era.

16. Tissue culture
Dating or age of rocks can by calculated.
The hypothesis supported by the result of many tests.
One of the geological periods of Paleozoic era.
One of the methods to produce genetically identical organisms by Asexual method.

17. Chemotherapy technique
One of the methods to produce genetically identical organisms by Asexual method.
One of the geological periods of Paleozoic era.
Dating or age of rocks can by calculated.
The hypothesis supported by the result of many tests.

18. Theory
One of the geological periods of Paleozoic era.
The hypothesis supported by the result of many tests.
Dating or age of rocks can by calculated.
One of the methods to produce genetically identical organisms by Asexual method.

19. Devonian period
The hypothesis supported by the result of many tests.
Dating or age of rocks can by calculated.
Administrating anticancer chemicals to the parents after after regular intervals
One of the geological periods of Paleozoic era.

20. The vaccination technique was developed by Edward Collins.
True
False

Biological Sciences Important Mcqs For Commissions Exam

Greek origin

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