NEET Biology: Medical Entrance Biology Questions and Answers

Useful for Medical Entrance Exams

Multiple Choice Questions on Lichen


1. The Lichens are
a)slow growing, long lived
b) fast growing, long lived
c) fast growing, short lived
d)slow growing, short lived

2. Lichens are not found
a) in big cities
b) arctic region
c)in villages
d) on bare rocks

3. A common phycobiont in lichen is  
a) Trebouxia
b) Cetraria
c) Microcystis
d) Oegogonium

Multiple Choice Questions on Lichen

4. Which of the following is a crutose lichen
A)Usnea
B) Peltigera
C) Usnea
D) Rhizocarpon

5. Lichen reproduce vegetatively by
a)fragmentation
b) soredia
c) isidia
d) all of these

6. Most lichens are
a)homoiomerous
b)heteromerous
c)both
d)none of these

7. Lichens growing on rocks are called  
a)corticoles
b)saxicoles
c)lignicoles
d)terricoles

8.  Which of the following is an edible lichen?
a)Ramalina
b)Lobaria
c)Cetraria
d) Ochrolechia

9.  Lichen are important in studies on atmosphere pollution because they
a)can also grown in greatly polluted atmosphere
b)very sensitive to pollutants
c)can readily multiply in polluted atmosphere
d)efficiently purify the atmosphere

10. Lichen are formed by the association of  
 a)ascomycetes only, with algae only
b)ascomycetes or basidiomycetes with algae or cyanobacteia
c)basidiomycetes only with alage or cyanobacteria
d)ascomycetes only, with algae only
Answers:
1. a)slow growing, long lived
2. a) in big cities
3. a) Trebouxia
4. D) Rhizocarpon
5. d) all of these
6. b)heteromerous
7. d)terricoles
8. c)Cetraria
9. b)very sensitive to pollutants
10. b)ascomycetes or basidiomycetes with algae or cyanobacteia
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MCQ on Biogeochemical Cycle (Nutrient cycle)

1. The main nitrogen reservoir in the biosphere is  
a) rock
b) ocean
c) organism
d) atmosphere

2. The sedimentary cycle is
a)oxygen
b)nitrogen
c)carbon
d)phosphorus

3. Which is the most common available form of S to plants
a) S
b) SO2
c) SO24+
d) H2S

4. Phosphorus cycle in the form of
a)HPO3-
b)P2
c) PO42-
d) AIPO3
MCQ on Biogeochemical Cycle - MCQ on Nutrient cycle


5. The largest reservoir of phosphorus in the biosphere is the
a)atmosphere
b) rock
c) organism
d) ocean

6. Fixation occur with the help of
 a)symbiotic bacteria
b)with the help of nitrogenise enzyme
c)leguminous nodules
d)all of these

7. Among the following biogeochemical cycles which one does not have losses due to respiration?
a)phosphorus
b)nitrogen
c)sulphur
d)all of these

8. The Phosphorus cycle is unusual in that it is entirely
a)within the aquatic ecosystem
b) within the terrestrial ecosystem
c) gaseous
d) sedimentary

9. Nitrogen is critical elements of the ecosystem because it is
a) labile
b) fixed by microbes
c) abundant in atmosphere
d) essential element

10. Which of the following atoms most often limits the primary productivity of an ecosystem?
a) Carbon
b) Nitrogen
c) Sulphur
d) Phosphorus
1. d) atmosphere
2. d)phosphorus
3. c) SO24+
4. c) PO42-
5. b) rock 
6. d)all of these
7. d)all of these
8.d) sedimentary
9.d) essential element
10. d) Phosphorus
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MCQ on Bacteria and Bacteriophage

1. Bacteria whose cells have only a single curve are known
a) vibrio
b) cocci
c) sprilla
d) bacilli

 2. Plasmid
a)replicate independently of the main chromosome
b)often contain antibiotic resistance genes
c)are transferred from one bacterium to another by conjugation
d)all of these

3. Largest among sulphur bacteria are
a) Chlorobium
b) Beggiatoa
c)Thiobacillus
d) Chromatium

4. Infectious proteins
a) Prions
b)Virusoids
c) Virion
d) None of these

5. Provirus is
a)a free DNA
b) an integrated viral genome
c) a free virus
d)a primitive virus

6. Germ theory of disease was putforth by
a)Edward Jenner
b)Weismann
c)Louis Pasteur
d)Robert Koch

7.Bacteria differ from other plants in that they do not have
a)DNA
b)RNA
c)cell wall
d)a well defined nucleus


8. Bacteriophage kill
a) viruses
b) bacteria
c) viruses and bacteria
d) none of these

9. Mesosome in a bacteria cell is?
a) plasmid
b) plasma membrane infolding for respiration
c) connection between two adjacent cells
d) none of these

10. The wall of bacteria consists of
a) Cellulose
b) N acetyl glucosamine
c) N acetyl muramic acid
d) both b and c
Learn more:
Answer:
1.a) vibrio
2. d) all of these
3. b) Beggiatoa
4. a) Prions
5. b) an integrated viral genome
6. b) Weismann
7. d) a well defined nucleus
8. b) bacteria
9. a) plasmid
10. d) both b and c
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2018 NEET UG Biology Questions and Answers (81-90)


81. Select the incorrect match :
(1) Submetacentric – L-shaped chromosomes chromosomes
(2) Allosomes – Sex chromosomes
(3) Lampbrush – Diplotene bivalents chromosomes
(4) Polytene chromosomes – Oocytes of amphibians
Answer (4 )

2018 NEET UG Biology Questions and Answers

82. Which of the following terms describe human dentition?
(1) Pleurodont, Monophyodont, Homodont
(2) Thecodont, Diphyodont, Heterodont
(3) Thecodont, Diphyodont, Homodont
(4) Pleurodont, Diphyodont, Heterodont
Answer ( 2 )

83. Which of the following events does not occur in rough endoplasmic reticulum?
(1) Cleavage of signal peptide

(2) Protein glycosylation
(3) Protein folding
(4) Phospholipid synthesis
Answer ( 4 )

84. Many ribosomes may associate with a single mRNA to form multiple copies of a polypeptide simultaneously. Such strings of ribosomes are termed as
(1) Plastidome
(2) Polyhedral bodies
(3) Polysome
(4) Nucleosome
Answer (3)
85. In which disease does mosquito transmitted pathogen cause chronic inflammation of lymphatic vessels?
(1) Ringworm disease
(2) Ascariasis
(3) Elephantiasis
(4) Amoebiasis
Answer (3)

86. Which of the following is not an autoimmune disease?

(1) Alzheimer's disease
(2) Rheumatoid arthritis
(3) Psoriasis
(4) Vitiligo                                                                                                     Answer (1)

87. Among the following sets of examples for divergent evolution, select the incorrect option :
(1) Brain of bat, man and cheetah
(2) Heart of bat, man and cheetah
(3) Forelimbs of man, bat and cheetah
(4) Eye of octopus, bat and man                                                                   Answer (4)

88. Conversion of milk to curd improves its nutritional value by increasing the amount of
(1) Vitamin B12
(2) Vitamin A
(3) Vitamin D
(4) Vitamin E 
                                                                                                                        Answer (1)
89. The similarity of bone structure in the forelimbs of many vertebrates is an example of
(1) Convergent evolution
(2) Analogy
(3) Homology
(4) Adaptive radiation
Answer ( 3 )


90. Which of the following characteristics represent ‘Inheritance of blood groups’ in humans?
a. Dominance
b. Co-dominance
c. Multiple allele
d. Incomplete dominance
e. Polygenic inheritance
(1) b, d and e (2) a, b and c (3) b, c and e (4) a, c and e
Answer ( 2 )

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NEET Biology Questions and Answers 2018 (71-80)

NEET Biology Questions and Answers 2018
71. AGGTATCGCAT is a sequence from the coding strand of a gene. What will be the corresponding sequence of the transcribed mRNA?
(1) ACCUAUGCGAU (2) UGGTUTCGCAT
(3) AGGUAUCGCAU (4) UCCAUAGCGUA
Answer (3) AGGUAUCGCAU 
72. Match the items given in Column I with those in Column II and select the correct option given below :
Column I                                                    Column II
a. Proliferative Phase                i. Breakdown ofendometriallining
b. Secretory Phase                    ii. Follicular Phase
c. Menstruation                         iii. Luteal Phase
      a b c
(1) ii iii i
(2) i iii ii
(3) iii ii i
(4) iii i ii

Answer (1) ii -a iii-b i-c
73. Match the items given in Column I with those in Column II and select the correct option given below :
Column I                                  Column II
a. Glycosuria                    i. Accumulation of uric acid in joints
b. Gout                            ii. Mass of crystallized salts within the kidney
c. Renal calculi               iii. Inflammation in glomeruli
d. Glomerular                 iv. Presence of nephritis glucose in urine
       a b c d
(1) ii iii i iv
(2) i ii iii iv
(3) iii ii iv i
(4) iv i ii iii
Answer (4) iv -a i-b ii-c iii-d
74. Match the items given in Column I with those in Column II and select the correct option given below:
Column I                             Column II
(Function)               (Part of Excretorysystem)
a. Ultrafiltration               i. Henle's loop
b. Concentration of urine ii. Ureter
c. Transport of urine        iii. Urinary bladder
d. Storage of urine           iv. Malpighian corpuscle

                                           v. Proximal   convoluted tubule
      a b c d
(1) v iv i ii
(2) iv i ii iii
(3) iv v ii iii
(4) v iv i iii
Answer ( 2 ) iv-a i-b ii-c iii-d
75. Which of the following gastric cells indirectly help in erythropoiesis?
(1) Goblet cells
(2) Mucous cells
(3) Chief cells
(4) Parietal cells
Answer(4) Parietal cells
76. Match the items given in Column I with those in Column II and select the correct option given below :
Column I             Column II
a. Fibrinogen  (i) Osmotic balance
b. Globulin     (ii) Blood clotting
c. Albumin     (iii) Defence mechanism

         a b c
(1) (i) (iii) (ii)
(2) (i) (ii) (iii)
(3) (iii) (ii) (i)
(4) (ii) (iii) (i)
Answer (4)
77. Which of the following is an occupational respiratory disorder?
(1) Botulism (2) Silicosis (3) Anthracis (4) Emphysema
Answer (2)Silicosis
78. Calcium is important in skeletal muscle contraction because it
(1) Detaches the myosin head from the actin filament.
(2) Activates the myosin ATPase by binding to it.
(3) Binds to troponin to remove the masking of active sites on actin for myosin.
(4) Prevents the formation of bonds between the myosin cross bridges and the actin
filament.
Answer (3) Binds to troponin to remove the masking of active sites on actin for myosin.
79. Nissl bodies are mainly composed of
(1) Nucleic acids and SER
(2) DNA and RNA
(3) Proteins and lipids
(4) Free ribosomes and RER
Answer (4) Free ribosomes and RER
80. Which of these statements is incorrect?
(1) Glycolysis operates as long as it is supplied with NAD that can pick up
hydrogen atoms
(2) Glycolysis occurs in cytosol
(3) Enzymes of TCA cycle are present in mitochondrial matrix
(4) Oxidative phosphorylation takes place in outer mitochondrial membrane
Answer (4) Oxidative phosphorylation takes place in outer mitochondrial membrane
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