Biology mcq questions test

Biology mcq questions test
Free Multiple Choice Question In Biology Online Practice Test
mcq exams multiple choice questins Biology

1. Surgical removal of both the kidneys would result in death because
(a) Water will accumulate in blood
(b) Urea will not be excreted
(c) Immune response will be suppressed
(d) Glucose will be lost from the body
Ans. (b)

2. An erythrocyte lives for approximately
(a) On week
(b) One month
(c) Four months
(d) One year
Ans. (c)

3. One of the factors required for the maturation of erythrocytes is
(a) Vitamin D
(b) Vitamin A
(c) Vitamin B12
(d) Vitamin C
Ans. (c)

4. Excess of urea in blood resulting from kidney failure is known as
(a) Ureotelic
(b) Uricotelic
(c) Urochrome
(d) Uraemia
Ans. (d)

5. Which one of the following minerals helps in erythropoietin?
(a) Mg2+
(b) Fe2+
(c) Cu2+
(d) Ca2+
Ans. (b)

6. The separation of macromolecules from molecules and ions can be accomplished by
(a) Photolysis
(b) Cytolysis
(c) Hemolysis
(d) Dialysis
Ans. (d)

7. Iron in hemoglobin exists as
(a) Unionized iron atom
(b) Ferric ions only
(c) Ferrous ions only
(d) Ferric or ferrous ions depending upon the oxygenated state
Ans. (c)

8. Amoeboid movement, a characteristic of amoebas and human macrophages, occurs when ectoplasm contracts to move endoplasm into a pseudopodium. Contraction of the ectoplasm appears to be caused by
(a) Sliding microtubules
(b) Contracting microfilaments
(c) Elongating cell walls
(d) Changes in turgor pressure
Ans. (d)

9. Axial skeleton in man is made up of
(a) 126 bones
(b) 100 bones
(c) 103 bones
(d) 80 bones
Ans. (b)

10. The advantage of RBC’s being biconcave is that?
(a) To increase surface area
(b) They can be packed up like coins
(c) They can fit into capillaries
(d) None of the above
Ans. (a)

11. Skull of man is made up of
(a) 10 bones
(b) 22 bones
(c) 30 bones
(d) 24 bones
Ans. (d)

12. Normal hemoglobin content of an adult man is
(a) 10.5 gm/100 ml of blood
(b) 12.5 gm/100 ml of blood
(c) 14.5 gm/100 ml of blood
(d) 13.5 gm/100 ml of blood
Ans. (c)

13. The total number of bones in the body of man is
(a) 205
(b) 206
(c) 216
(d) 636
Ans. (b)

14. Which blood constituent makes up more of the volume of blood?
(a) Red blood cells
(b) Plasma
(c) Blood proteins
(d) White blood cells
Ans. (b)

15. Cranium in man is made up of
(a) 10 bones
(b) 12 bones
(c) 16 bones
(d) 8 bones
Ans. (b)

16. Number of RBC in an adult man per rum3 of blood is
(a) 5,000
(b) 50,000
(c) 500,000
(d) 5,000,000
Ans. (d)

17. The abnormal increase in the total RBC count is referred to as
(a) Pneumonia
(b) Polycythemia
(c) Leucopenia
(d) Anemia
Ans. (b)

18. Foramen magnum is found on
(a) Lateral side of skull
(b) Neural canal
(c) Anterior side of skull
(d) Posterior side of skull
Ans. (d)

19. Number of RBC increases if one lives at higher altitude because
(a) There is less oxygen on mountains
(b) More heat is required in body for producing body warmth
(c) There are no germs in mountain air
(d) There is more oxygen on mountains
Ans. (a)

20. Number of cervical vertebrae in camel
(a) Same as that of whale
(b) More as that of horse
(c) less than that of rabbit
(d) more than of rabbit
Ans. (a)

21. The life span of human WBC is normally
(a) 12-13 days
(b) 80-90 days
(c) 100-120 days
(d) 20-30 days
Ans. (a)

22. Total number of bones present in forelimb of man is
(a) 25
(b) 26
(c) 30
(d) 24
Ans. (c)

23. The largest corpuscles in mammalian blood are
(a) Erythrocytes
(b) Monocytes
(c) Lymphocytes
(d) Basophiles
Ans. (b)

24. Patella is a kind of
(a) Cartilage bone
(b) Membrane bone
(c) Cartilage
(d) Sesamoid bone
Ans. (d)

25. “Leukemia” a cancer is due to
(a) Excessive production of WBCs
(b) Excessive production of RBCs
(c) Excessive production of platelets
(d) All of theses
Ans. (a)

Biology MCQ quiz

Biology MCQ quiz
Biology Multiple Choice Quiz
Biology - Online Multiple Choice Questions


1. Lysosomes are generally found in
(a) Animal cells
(a) Plant cells
(c) Both animal and plant cells
(d) Bacterial cells
Ans. (a)

2. The filaments that specialize in moving organelles are
(a) Microfilaments
(b) Intermediate filaments
(c) Actin
(d) Microtubules
Ans. (d)

3. Nucleus was first discovered by
(a) Robert Brown
(b) Robert Koch
(c) Leeuwenhoek
(d) F. Sanger
Ans. (a)

4. The basis of grouping of living organisms into eukaryotes and prokaryotes is
(a) Nucleus
(b) Ribosomes
(c) Plasma membrane
(d) None of the above
Ans. (a)

5. Functional activities of the cell are controlled by
(a) Protoplasm
(b) Nucleolus
(c) Mitochondria
(d) Nucleus
Ans. (d)


6. Nucleo-cytoplasmic traffic through nuclear pore is facilitated by
(a) Protein rhodopsin
(b) Nuclear lamina
(c) Lipid bilayer of all membranes
(d) Protein nucleoplasmin
Ans. (b)

7. Chromosomes are
(a) Extranuclear with chromatin
(b) Intranuclear without chromatin
(c) Extranuclear without chromatin
(d) Intranuclear with chromatin
Ans. (d)

8. Region of chromosomes where force is exerted during separation of dividing chromosomes is
(a) Chromonema
(b) Centromere
(c) Chromomere
(d) Celomere
Ans. (b)

9. Chromosomes having equal arms are known as
(a) Telocentric chromosome
(b) Metacentric chromosome
(c) Concentric chromosome
(d) Acrocentric chromosome
Ans. (b)

10. A chromatid represents
(a) Complete chromosome
(b) One half of a chromosome
(c) Haploid number
(d) A genome
Ans. (b)

11. Average thickness of unit cell membrane is
(a) 5Å
(b) 25 Å
(c) 75 Å
(d) 250 Å
Ans. (c)

12. Cell membrane carbohydrates participate in
(a) Transporting substances across the membrane
(b) cell-to-cell recognition
(c) Attaching the membrane to the cytoskeleton
(d) Cell adhesions
Ans. (b)

13. Which one of the following represents the best stage in which to view the shape, size and number of chromosomes?
(a) Prophase
(b) Metaphase
(c) Telophase
(d) Interphase
Ans. (b)

14. Who coined the term ‘meiosis’?
(a) F.F. Blackmann
(b) J.B. Farmer
(c) A. Flemming
(d) J.F. Enders
Ans. (b)

15. Synthesis of RNA and protein takes place in which phase of the cell cycle?
(a) S-phase
(b) M-phase
(c) G1 and G2 phase
(d) None of the above
Ans. (c)

16. During cell cycle DNA synthesis takes place in
(a) Entire cycle
(b) S-phase
(c) G1 and S-phase
(d) G2 and S-phase
Ans. (b)


17. Which plant material is best suited for studying mitosis in classroom?
(a) Anthers
(b) Root tips
(c) Pieces of bark
(d) Shoot apex
Ans. (b)

18. Colchicines interferes in
(a) Chromosome condensation
(b) DNA replication
(c) Organization and orientation of spindle elements
(d) None of these
Ans. (c)


19. The attachment of a chromosome to the spindle fiber is brought about by
(a) Chromomere
(b) Centromere
(c) Satellite region
(d) Centriole
Ans. (b)
20. Chromosomes can be counted at
(a) Prophase
(b) Metaphase
(c) Anaphase
(d) Telophase
Ans. (b)

Plants Soil and Environmental science Sample test paper

Plants Soil and Environmental science Sample test paper
Environmental Science - Sample Questions
Earth & Environmental Science - Online Multiple Choice Quiz
1. The pyramid that cannot be inverted in a stable ecosystem is pyramid of
(a) number
(b) energy
(c) biomass
(d) all the above
Ans. (b)


2. In nitrogen cycle the bacteria, which change proteins to ammonia, are known as
(a) bacteria of decay
(b) denitrifying bacteria
(c) nitrogen fixing bacteria
(d) nitrate bacteria
Ans. (a)



3. To prevent soil erosion, a farmer plants a hedge across a field. This method works
because
(a) the hedge prevents the soil from direct impact of rain water
(b) the roots of plants prevent the soil erosion
(c) the hedge absorbs minerals from the soil, which makes it most compact
(d) none of the above
Ans. (b)


4. Water logged soil is
(a) physically as well as physiologically dry
(b) physically wet but physiologically dry
(c) physically dry
(d) physically as well as physiologically wet
Ans. (b)

5. Which is the characteristic feature of a physiologically dry soil?
(a) There is plenty of water in the soil
(b) Light available to the plants is not sufficient
(c) Concentration of salts is very high in soil water
(d) None of the above
Ans. (c)

6. Which of the following is a non-renewable resource?
(a) Water
(b) Coal
(c) Forests
(d) Wild life
Ans. (b)


7. The presence of ozone in the atmosphere of earth
(a) is advantageous since it supplies 02 for people travelling in jets
(b) helps in checking the penetration of ultraviolet rays to earth
(c) hinder higher rate of photosynthesis
(d) has been responsible for increasing the average global temperature in recent years
Ans. (b)


8. Dudhawa National Park is located in
(a) Uttar Pradesh
(b) Himachal Pradesh
(c) Arunachal Pradesh
(d) Madhya Pradesh
Ans. (a)


9. The endangered largest living lemur Idri idri is found in
(a) Madagascar
(b) Mauritius
(c) Sri Lanka
(d) India
Ans. (a)

10. The Siberian crane from Russia is a regular visitor to the bird sanctuary in which place in India?
(a) Lailbagh, Baaga1ore
(b) Vedanthgol sanctuary, Tamil Nadu
(c) Ranganathathittis sanctuary, Karnataka
(d) Bharatpur sanctuary, Rajasthan
Ans. (d)


11. Pollutant from motorcar exhaust that causes mental diseases is
(a) lead
(b) NO2
(c) SO2
(d) Hg
Ans. (a)


12: Acid rain is caused due to increase in concentration of
(a) O2 and NO2
(b) CO and CO2
(c) CO and SO3
(d) ozone and dust
Ans. (a)


13. If there was no carbon dioxide in the earth’s atmosphere, the temperature of the earth
would be
(a) higher than the present
(b) dependent on the amount of oxygen in the atmosphere
(b) less than the present
(d) the same
Ans. (c)


14. Deforestation has an alarming effect on
(a) increase in grazing area
(b) weed control
(c) soi1 erosion
(d) sunlight
Ans. (c)

15. In the recent years there has been an increasing incidence of floods in the plains of
Northern India because
(a) there has been an increase in annual rainfall
(b) the rate of silting of dams has gone up
(c) there has been increased deforestation in the catchment areas
(d) increased areas of land is being self cultivated
Ans. (c)

16. Lichens are important in the studies on atmospheric pollution because they
(a) can also grow in greatly polluted atmosphere
(b) can readily multiply in polluted atmosphere
(c) are very sensitive to pollutants like SO2
(d) efficiently purify the atmosphere
Ans. (c)


17. BOD stands for
(a) biochemical oxygen demand
(b) chemical oxygen demand
(c) growing algae in large tanks
(d) biotic community
Ans. (a)


18. Which of the following is main factor in water pollution?
(a) Pesticides
(b) Industrial waste
(c) detergent
(d) NH3
Ans. (c)



19. In a highly industrialised area, which of the following will be virtually absent?
(a) Algae
(b) Lichens
(c) Ferns
(d) Bryophytes
Ans. (b)

20. The assistance received from Dr. Norman Earnest Borlang, an eminent agronomist from America is worth mentioning in
(a) White revolution
(b) Blue revolution
(c) Green revolution
(d) None of the above
Ans. (c)