NEET Biology 2019 Questions and Answers (1-10)

1. The Earth Summit held in Rio de Janeiro in 1992 was called
(1) to reduce CO2 emissions and global warming
(2) for the conservation of biodiversity and sustainable utilization of its benefits
(3) to assess threat posed to native species by invasive weed species
(4) for immediate steps to discontinue use of CFCs that were damaging the ozone layer
Answer : (2) for conservation of biodiversity and sustainable utilization of its benefits

2. Colostrum the yellowish fluid, secreted by mother during the initial days of lactation is very essential to impart immunity to the newborn infants because it contains
(1) Natural killer cells (2) Monocytes  (3) Macrophages  (4) Immunoglobulin A
Answer: (4) Immunoglobulin A

3. Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following
(1) Closure of stomata (2) Flaccidity of bulliform cells
(3) Shrinkage of air spaces in spongy mesophyll (4) Tyloses in vessels
Answer (2) Flaccidity of bulliform cells

4. The shorter and longer arms of a submetacentric chromosome are referred to as
(1) s-arm and l-arm respectively (2) p-arm and q-arm respectively
(3) q-arm and p-arm respectively (4) m-arm and n-arm respectively
Answer (2) p-arm and q-arm respectively

5. Respiratory Quotient (RQ) value of tripalmitin is
(1) 0.9 (2) 0.7 (3) 0.07 (4) 0.09
Answer (2) 0.7
NEET Biology 2019 Questions and Answers
6. Which of the following is a commercial blood cholesterol lowering agent?
(1) Cyclosporin A (2) Statin (3) Streptokinase (4) Lipases
Answer :(2) Statin

7. Match the following structures with their respective location in organs
 (a) Crypts of Lieberkuhn (i) Pancreas
 (b) Glisson's Capsule (ii) Duodenum
 (c) Islets of Langerhans (iii) Small intestine
 (d) Brunner's Glands (iv) Liver
Select the correct option from the following
      (a) (b) (c) (d)
(1) (iii) (i) (ii) (iv)
(2) (ii) (iv) (i) (iii)
(3) (iii) (iv) (i) (ii)
(4) (iii) (ii) (i) (iv)
Answer: (3) a-(iii), b-(iv),c- (i),d- (ii)
8. Which part of the brain is responsible for thermoregulation?
 (1) Cerebrum (2) Hypothalamus (3) Corpus callosum (4) Medulla oblongata
Answer :(2) Hypothalamus
9. Consider the following features
(a) Organ system level of organisation
(b) Bilateral symmetry
(c) True coelomates with segmentation of body

Select the correct option of animal groups which possess all the above characteristics:
(1) Annelida, Arthropoda and Chordata
(2) Annelida, Arthropoda and Mollusca
(3) Arthropoda, Mollusca and Chordata
(4) Annelida, Mollusca and Chordata
Answer : (1) Annelida, Arthropoda and Chordata

 10. Select the correct sequence of organs in the alimentary canal of cockroach starting from mouth
(1) Pharynx -> Oesophagus -> Crop -> Gizzard ->Ileum ->Colon -> Rectum
(2) Pharynx -> Oesophagus -> Gizzard -> Crop-> Ileum ->Colon ->Rectum
(3) Pharynx -> Oesophagus ->Gizzard ->Ileum -> Crop ->Colon->Rectum
(4) Pharynx -> Oesophagus -> Ileum -> Crop->Gizzard -> Colon -> Rectum
Answer (1) Pharynx -> Oesophagus -> Crop -> Gizzard ->Ileum ->Colon -> Rectum
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