NEET Biology 2020 All Questions with Answer Key Part 2

 46.  Presence of which of the following conditions in urine are indicative of Diabetes Mellitus?


(1) Uremia and Renal Calculi

(2) Ketonuria and Glycosuria

(3) Renal calculi and Hyperglycaemia

(4) Uremia and Ketonuria

 

Answer (2)



47.  Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their


(1) Growth response

(2) Defence action

(3) Effect on reproduction

(4) Nutritive value

 

Answer (2)


48.  Which of the following would help in prevention of diuresis?


(1) Reabsorption of Na+ and water from renal tubules due to aldosterone

(2) Atrial natriuretic factor causes vasoconstriction

(3) Decrease in secretion of renin by JG cells

(4) More water reabsorption due to undersecretion of ADH

 

Answer (1)


49.  Select the correct match


(1) Phenylketonuria – Autosomal dominant trait

(2) Sickle cell anaemia – Autosomal recessive trait, chromosome-11

(3) Thalassemia – X linked

(4) Haemophilia – Y linked

 

Answer (2)


50.  Which of the following is not an attribute of a population?


(1) Natality

(2) Mortality

(3) Species interaction

(4) Sex ratio

 

Answer (3)


51.  Which of the following statements about inclusion bodies is incorrect?


(1) These are involved in ingestion of food particles

(2) They lie free in the cytoplasm

(3) These represent reserve material in cytoplasm

(4) They are not bound by any membrane

 

Answer (1)


52.  The transverse section of a plant shows following anatomical features :


(a) Large number of scattered vascular bundles surrounded by bundle sheath

(b) Large conspicuous parenchymatous ground tissue

(c) Vascular bundles conjoint and closed

(d) Phloem parenchyma absent

Identify the category of plant and its part :

(1) Monocotyledonous root

(2) Dicotyledonous stem

(3) Dicotyledonous root

(4) Monocotyledonous stem

 

Answer (4)


53.  In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?


(1) Gross primary productivity is always more than net primary productivity

(2) Gross primary productivity and Net primary productivity are one and same

(3) There is no relationship between Gross primary productivity and Net primary productivity

(4) Gross primary productivity is always less than net primary productivity

 

Answer (1)


54.  In water hyacinth and water lily, pollination takes place by :


(1) Water currents only

(2) Wind and water

(3) Insects and water

(4) Insects or wind

 

Answer (4)


55.  Which of the following is put into Anaerobic sludge digester for further sewage treatment?


(1) Floating debris

(2) Effluents of primary treatment

(3) Activated sludge

(4) Primary sludge

 

Answer (3)


56.  The process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and in early morning is


(1) Root pressure

(2) Imbibition

(3) Plasmolysis

(4) Transpiration

 

Answer (1)


57.  Cuboidal epithelium with brush border of microvilli is found in


(1) Ducts of salivary glands

(2) Proximal convoluted tubule of nephron

(3) Eustachian tube

(4) Lining of intestine

 

Answer (2)


58.  Select the correct statement.


(1) Glucagon is associated with hypoglycemia.

(2) Insulin acts on pancreatic cells and adipocytes.

(3) Insulin is associated with hyperglycemia.

(4) Glucocorticoids stimulate gluconeogenesis.

 

Answer (4)


59.  Which of the following is not an inhibitory substance governing seed dormancy?


(1) Abscisic acid

(2) Phenolic acid

(3) Para-ascorbic acid

(4) Gibberellic acid

 

Answer (4)


60.  According to Robert May, the global species diversity is about


(1) 20 million

(2) 50 million

(3) 7 million

(4) 1.5 million

 

Answer (3)


61.  Match the trophic levels with their correct species examples in grassland ecosystem.


(a)

Fourth trophic level

(i)

Crow

(b)

Second trophic level

(ii)

Vulture

(c)

First trophic level

(iii)

Rabbit

(d)

Third trophic level

(iv)

Grass

Select the correct option

 

(a)

(b)

(c)

(d)

(1)

(iii)

(ii)

(i)

(iv)

(2)

(iv)

(iii)

(ii)

(i)

(3)

(i)

(ii)

(iii)

(iv)

(4)

(ii)

(iii)

(iv)

(i)

 

Answer (4)


62.  The first phase of translation is


(1) Recognition of DNA molecule

(2) Aminoacylation of tRNA

(3) Recognition of an anti-codon

(4) Binding of mRNA to ribosome

 

Answer (2)


63.  Strobili or cones are found in


(1) Pteris

(2) Marchantia

(3) Equisetum

(4) Salvinia

 

Answer (3)


64.  Match the following columns and select the correct option.


 

Column-I

 

Column-II

(a)

6-15 pairs of gill slits

(i)

Trygon

(b)

Heterocercal caudal fin

(ii)

Cyclostomes

(c)

Air Bladder

(iii)

Chondrichthyes

(d)

Poison sting

(iv)

Osteichthyes

 

 

(a)

(b)

(c)

(d)

(1)

(iii)

(iv)

(i)

(ii)

(2)

(iv)

(ii)

(iii)

(i)

(3)

(i)

(iv)

(iii)

(ii)

(4)

(ii)

(iii)

(iv)

(i)

 

Answer (4)


65.  Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage (G0). This process occurs at the end of 


(1) G1 phase

(2) S phase

(3) G2 phase

(4) M phase

 

Answer (4)


66.  Identify the correct statement with reference to human digestive system.


(1) Serosa is the innermost layer of the alimentary canal

(2) Ileum is a highly coiled part

(3) Vermiform appendix arises from duodenum

(4) Ileum opens into small intestine

 

Answer (2)


67.  In which of the following techniques, the embryos are transferred to assist those females who cannot conceive?


(1) GIFT and ZIFT

(2) ICSI and ZIFT

(3) GIFT and ICSI

(4) ZIFT and IUT

 

Answer (4)


68.  The plant parts which consist of two generations - one within the other


(a) Pollen grains inside the anther

(b) Germinated pollen grain with two male gametes

(c) Seed inside the fruit

(d) Embryo sac inside the ovule

(1) (a), (b) and (c)

(2) (c) and (d)

(3) (a) and (d)

(4) (a) only

 

Answer (3)


69.  Dissolution of the synaptonemal complex occurs during


(1) Zygotene

(2) Diplotene

(3) Leptotene

(4) Pachytene

 

Answer (2)


70.  Match the following columns and select the correct option.


 

Column-I

 

Column-II

(a)

Organ of Corti

(i)

Connects middle ear and pharynx

(b)

Cochlea

(ii)

Coiled part of the labyrinth

(c)

Eustachian tube

(iii)

Attached to the oval window

(d)

Stapes

(iv)

Located on the basilar membrane

 

 

(a)

(b)

(c)

(d)

(1)

(iii)

(i)

(iv)

(ii)

(2)

(iv)

(ii)

(i)

(iii)

(3)

(i)

(ii)

(iv)

(iii)

(4)

(ii)

(iii)

(i)

(iv)

 

 

Answer (2)


71.  The ovary is half inferior in :


(1) Mustard

(2) Sunflower

(3) Plum

(4) Brinjal

 

Answer (3)


72.  Identify the basic amino acid from the following.


(1) Glutamic Acid

(2) Lysine

(3) Valine

(4) Tyrosine

 

Answer (2)


73.  Match the following columns and select the correct option.


 

Column-I

 

Column-II

(a)

Eosinophils

(i)

Immune response

(b)

Basophils

(ii)

Phagocytosis

(c)

Neutrophils

(iii)

Release histaminase, destructive enzymes

(d)

Lymphocytes

(iv)

Release granules containing histamine

 

 

(a)

(b)

(c)

(d)

(1)

(iv)

(i)

(ii)

(iii)

(2)

(i)

(ii)

(iv)

(iii)

(3)

(ii)

(i)

(iii)

(iv)

(4)

(iii)

(iv)

(ii)

(i)

 

 

Answer (4)


74.  Match the following


(a)

Inhibitor of catalytic activity

(i)

Ricin

(b)

Possess peptide bonds

(ii)

Malonate

(c)

Cell wall material in fungi

(iii)

Chitin

(d)

Secondary metabolite

(iv)

Collagen

Choose the correct option from the following

 

(a)

(b)

(c)

(d)

(1)

(iii)

(i)

(iv)

(ii)

(2)

(iii)

(iv)

(i)

(ii)

(3)

(ii)

(iii)

(i)

(iv)

(4)

(ii)

(iv)

(iii)

(i)

 

Answer (4)



75.  Identify the correct statement with regard to G1 phase (Gap 1) of interphase.


(1) Reorganisation of all cell components takes place.

(2) Cell is metabolically active, grows but does not replicate its DNA.

(3) Nuclear Division takes place.

(4) DNA synthesis or replication takes place.

 

Answer (2)


76.  Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop.


(1) Gibberellin

(2) Ethylene

(3) Abscisic acid

(4) Cytokinin

 

Answer (1)


77.  Identify the wrong statement with reference to the gene ‘I’ that controls ABO blood groups.


(1) A person will have only two of the three alleles.

(2) When IA and IB are present together, they express same type of sugar.

(3) Allele ‘i’ does not produce any sugar.

(4) The gene (I) has three alleles.

 

Answer (2)


78.  Identify the wrong statement with reference to immunity.


(1) When ready-made antibodies are directly given, it is called “Passive immunity”.

(2) Active immunity is quick and gives full response.

(3) Foetus receives some antibodies from mother, it is an example for passive immunity.

(4) When exposed to antigen (living or dead) antibodies are produced in the host’s body. It is called “Active immunity”.

 

Answer (2)


79.  The enzyme enterokinase helps in conversion of


(1) trypsinogen into trypsin

(2) caseinogen into casein

(3) pepsinogen into pepsin

(4) protein into polypeptides

 

Answer (1)


80.  The specific palindromic sequence which is recognized by EcoRI is


(1) 5' - GGAACC - 3'

3' - CCTTGG - 5'

(2) 5' - CTTAAG - 3'

3' - GAATTC - 5'

(3) 5' - GGATCC - 3'

3' - CCTAGG - 5'

(4) 5' - GAATTC - 3'

3' - CTTAAG - 5'

 

Answer (4)


81.  Match the following columns and select the correct option.


 

Column-I

 

Column-II

(a)

Bt cotton

(i)

Gene therapy

(b)

Adenosine deaminase deficiency

(ii)

Cellular defence

(c)

RNAi

(iii)

Detection of HIV infection

(d)

PCR

(iv)

Bacillus thuringiensis

 

 

(a)

(b)

(c)

(d)

(1)

(iii)

(ii)

(i)

(iv)

(2)

(ii)

(iii)

(iv)

(i)

(3)

(i)

(ii)

(iii)

(iv)

(4)

(iv)

(i)

(ii)

(iii)

 

Answer (4)



82.  Floridean starch has structure similar to


(1) Amylopectin and glycogen

(2) Mannitol and algin

(3) Laminarin and cellulose

(4) Starch and cellulose

 

Answer (1)


83.  Which of the following statements is not correct?


(1) The proinsulin has an extra peptide called C-peptide.

(2) The functional insulin has A and B chains linked together by hydrogen bonds.

(3) Genetically engineered insulin is produced in E.Coli.

(4) In man insulin is synthesised as a proinsulin

 

Answer (2)


84.  Flippers of Penguins and Dolphins are examples of


(1) Convergent evolution

(2) Industrial melanism

(3) Natural selection

(4) Adaptive radiation

 

Answer (1)


85.  Which of the following refer to correct example(s) of organisms which have evolved due to changes in environment brought about by anthropogenic action?


(a) Darwin’s Finches of Galapagos islands.

(b) Herbicide resistant weeds.

(c) Drug resistant eukaryotes.

(d) Man-created breeds of domesticated animals like dogs.

(1) (a) and (c)

(2) (b), (c) and (d)

(3) only (d)

(4) only (a)

 

Answer (2)


86.  Identify the wrong statement with reference to transport of oxygen.


(1) Partial pressure of CO2 can interfere with O2 binding with haemoglobin

(2) Higher H+ conc. in alveoli favours the formation of oxyhaemoglobin

(3) Low pCO2 in alveoli favours the formation of oxyhaemoglobin

(4) Binding of oxygen with haemoglobin is mainly related to partial pressure of O2

 

Answer (2)


87.  The process of growth is maximum during


(1) Lag phase

(2) Senescence

(3) Dormancy

(4) Log phase

 

Answer (4)


88.  Which of the following regions of the globe exhibits highest species diversity?


(1) Madagascar

(2) Himalayas

(3) Amazon forests

(4) Western Ghats of India

 

Answer (3)


89.  The sequence that controls the copy number of the linked DNA in the vector, is termed


(1) Ori site

(2) Palindromic sequence

(3) Recognition site

(4) Selectable marker

 

Answer (1)


90.  Match the following columns and select the correct option.


 

Column-I

 

Column-II

(a)

Placenta

(i)

Androgens

(b)

Zona pellucida

(ii)

Human Chorionic Gonadotropin (hCG)

(c)

Bulbo-urethral glands

(iii)

Layer of the ovum

(d)

Leydig cells

(iv)

Lubrication of the Penis

 

 

(a)

(b)

(c)

(d)

(1)

(i)

(iv)

(ii)

(iii)

(2)

(iii)

(ii)

(iv)

(i)

(3)

(ii)

(iii)

(iv)

(i)

(4)

(iv)

(iii)

(i)

(ii)

 

Answer (3)


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