NEET TEST SERIES 115 BIOLOGY

1. Which organelle is surrounded by a double phospholipid bilayer with many large pores?

(a) Nucleus
(b) Plasma membrane
(c) Golgi apparatus
(d) Mitochondrion

2. Coconut milk (coconut waler) is widely used in tissue culture because it contains

(a) auxins
(b) ethylene
(c) cytokinin
(d) gibberellins

3. The Okazaki fragments in ON A chain growth

(a) polymerize in the 3’ – to – 5’ direction and forms replication fork
(b) proves semi-conservative nature of ON A replication
(c) polymerize in the 5′ – to – 3* direction and explain 3′ – to – 5′ DNA replication
(d) result in transcription

4. Which bacteria is utilized in gober gas plant?

(a) Methanogens
(b) Nitrifying bacteria
(c) Ammonifying bacteria
(d) Denitrifying bacteria

5. The logistic population growth is expressed by the equation:

6. The reactions of Calvin cycle not directly dependent on light, but they usually do not occur at night. Why?

(a) Night is often too cold for these reactions to occur.
(b) CO₂ concentration in night is too high for these reactions to occur.
(c) Plants usually open their stomata at night.
(d) Calvin cycle is dependent on the products of light reaction.

7. In down’s syndrome of a male chi Id, the sex complement is

(a) XO
(b) 45 XY
(c) 45 XX
(d) XXY

8. Lack of independent assortment of two genes A and B in fruit fly Drosophila is due to

(a) repulsion
(b) recombination
(c) linkage
(d) crossing over

9. Pick out the correct statements
(i) Haemophilia is a sex-linked recessive disease
(ii) Down’s syndrome is due to aneuploidy
(iii) Phenylketonuria is an autosomal recessive gene disorder
(iv) Sickle cell anaemia is a X-linked recessive gene disorder

(a) (i) and (iv) are correct
(b) (iii) and (iv) are correct
(c) (i),(iii) and (lv) are correct
(d) (i). (ii) and (iii) are correct

10. The first step of photosynthesis is

(a) excitation of electron of chlorophyll by a photon of light
(b) formation of ATP
(c) attachment of CO₂ to 5 carbon sugar
(d) ionisation of water

11. Which of these statements is incorrect?

(a) Enzymes of TCA cycle are present in mitochondrial matrix
(b) Glycolysis occurs in cytosol
(c) Oxidative phosphorylation takes place in outer mitochondrial membrane
(d) Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms

12. “Foolish seedling” disease of rice led to the discovery of

(a) ABA
(b) 2,4-D
(c) 1AA
(d) GA

13. Which one of the following grow th regulators is known as ‘stress hormone’?

(a) Abscissic acid
(b) Ethylene
(c) GA₃
(d) Indole acetic acid

14. Diadelphous stamens are found in

(a) China rose and citrus
(b) China rose
(c) Citrus 
(d) Pea

15. Statement I: Biooontrol refers to the useofbiokigical methods for controlling plant diseases and pests.
     Statement II: Use of biocontrol measures with greatly reduced our dependence on toxic chemical and pesticide. In the light of the above statements, choose the correct answer from the options given below:

(a) Both Statement I and Statement II are incorrect
(b) Statement I is correct but Statement II is incorrect
(c) Statement I is incorrect but Statement II is correct
(d) Both Statement I and Statement II are correct

16. Statement I: Frame-shift mutation arise due to change in single base pair of DNA.
        Statement II: Point-mutation is due to insertion and deletion of base pair.

(a) Both Statement I and Statement II are incorrect
(b) Statement I is correct but Statement II is incorrect
(c) Statement I is incorrect but Statement II is correct
(d) Both Statement I and Statement II are correct

17. Which parental phenotypes would produce offspring with blood group phenotypes in the expected ratio of 1 type A : 1 type B?

18. The given figures (A and B) show the modification of roots. Which of the following statements regarding the figures is correct?

(a) Tap roots of carrot, turnip and adventitious root of sweet potato, get swollen and store food.
(b) Pneumatophores conducts water, minerals & photosynthesis
(c) Pneumatophore is found in the plants that grow’ in sandy soil.
(d) Turnip & carrot shows adventitious roots and sweet potato shows tap root.

19. Match column-1 with column-ll and select the correct answer using the codes given below:

20. Which of the following statements of incorrect?

(a) Oxidation-reducat ion reactions produce proton gradi ent in respiration
(b) During aerobic respiration, role of oxygen is limited to the terminal stage
(c) In ETC (Electron Transport Chain), one molecule of N ADH + FT gives rise to 2 ATP molecules, and one FADH₂ gives rise to 3 ATP molecules
(d) ATP is synthesized through complex V

131. Statement I: The movement of electrons is downhill, in terms of redox potential scale in electron transport chain
     Statement II: The electrons are used up as they pass through the electron transport chain. In the light of the above statements, choose the correct answer from the options given below:

(a) Both Statement I and Statement II are incorrect
(b) Statement I is correct but Statement II is incorrect
(c) Statement I is incorrect but Statement II is correct
(d) Both Statement I and Statement II are correct

132. Conservation of biodiversity due to services like provision of pollinators and climate regulation is an example of

(a). Narrowly utilitarian
(b). Broadly utilitarian
(c). Ethical utilitarian
(d). None of these133.

133. Match column-l with column-ll and select the correct option from the codes given below:

134. Match column-l with column-ll and select the correct answer using the codes given below:

135. Match the following and choose the correct option:

136. Diversity in the type of beaks of finches adapted to different feeding habits on the Galapagos Islands, as observed by Darwin, provides evidence for

(a) intraspecific variations
(b) intraspecific competition
(c) interspecific competition
(d) origin of Species by natural selection

137. A man having a genotype WwXxYxZz can produce a number of genetically different sperms and a women of genotype PpQQRrSS can generate B number of genetically different eggs. Determine the value of A and B.

(a) A=8, B=4
(b) A=16, B=4
(c) A=32, B=8
(d) A=4, B=8

138. Plasmid has been used as vector because to

(a) both its ends show replication.
(b) it can move between prokaryotic and eukaryotic cells.
(c) It transfer the piece of DNA attached to it.
(d) it has antibiotic resistance gene

139. Statement I: Ciliary movements are observed in internal tubular organs.
        Statement II: About 80% of the body weight of a human adult is contributed by muscles.

(a) Both Statement I and Statement II are incorrect
(b) Statement I is correct but Statement II is incorrec
(c) Statement I is incorrect but Statement II is correct
(d) Both Statement I and Statement II are correct

140. Read the following statements regarding the various techniques used in cancer detection:

(i) Cancer detection is based on biopsy and histopathological studies of the tissues and the blood and bone marrow tests for increased cell counts in case of leukemia.

(ii) In biopsy, a piece of the suspected tissue cut into thin sections is stained and examined under microscope by the pathologist.

(iii) Techniques like radiography (use of X-rays), CT (computed tomography) and MRI (magnetic resonance imaging) are very useful to detect cancers of the internal organs.

(iv) Computed tomography uses strong magnetic fields and non-ionising radiations to detect physiological changes in living tissues.

(v) Early detection of cancer is essential as it allow the disease to be treated successfully.

Which of the following statement are incorrect?

(a) (i) and (iii)
(b) (ii), (iv) and (v)
(c) (iii) and (iv)
(d) Only (iv)

141. Assertion (A): STDs are transmitted through sexual intercourse
        Reason (R): STDs can be prevented by using barrier contraceptives like condoms.

(a) Both (A) and (R) are correct but (R) is not the correct explanation of (A)
(b) (A) is correct but (R) is not correct
(c) (A) is not correct but (R) is correct
(d) Both (A) and (R) are correct and (R) is the correct explanation of (A)

142. Statement I: Increased permeability of Na⁺ ions due to the rise in stimulus is short lived.
        Statement II: The resting membrane potential of membrane at the site of excitation is restored by Na* and Ci~ ions.

(a) Both Statement I and Statement II are incorrect
(b) Statement I is correct but Statement II is incorrect
(c) Statement I is incorrect but Statement II is correct
(d) Both Statement I and Statement II are correct

143. Pick out the correct statement.

(a) Chitin is a homopolymer.
(b) Collagen is the most abundant protein in the whole of the biosphere.
(c) Proteins are linear chains of amino acids linked by peptide bonds.
(d) In a polysaccharide, the individual monosaccharides are linked by a phosphodiester bond.

144. Match the column-l with column-ll and choose the correct option.

145. Match the items given in column-l with those in column-ll and select the correct option given below.

146. Consumption of which one of the following foods can prevent the kind of blindness associated with vitamin ‘A’ deficiency?

(a) ‘Flavr Savr’ tomato
(b) Canola
(c) Golden rice
(d) Bt-Brinjal

147. What is common among silverfish, scorpion, crab and honey bee?

(a) Compound eyes
(b) Poison gland
(c) Jointed legs
(d) Metamorphosis

148. Mark the unmatched one

(a) Neutrophils – Phagocytic
(b) Basophils – Secrete histamine
(c) Acidophils – Secrete heparin
(d) Lymphocytes – Secrete antibodies

149. If for some reason, the vasa efterentia in the human reproductive system get blocked, the gametes will not be transported from

(a) testes to epididymis
(b) epididymis to vas deferens
(c) ovary to uterus
(d) vagina to uterus

150. Proximal and distal convoluted tubules are parts of

(a) Seminiferous tubules
(b) Nephron
(c) Oviduct
(d) Vas deferens

151. Deposition of uric acid crystals within the synovial joint causes:

(a) Osteoarthritis
(b) Rheumatoid arthritis
(c) Gout
(d) Paralysis

152. Statement I: Malarial parasite requires two hosts humans and mosquitoes to complete its life cycle.
       Statement II: Haemozoin is a toxic substance produced by the rupturing of liver cells during malarial infection. In the light of the above statements, choose the correct answer from the options given below:

(a) Both Statement I and Statement II are incorrect
(b) Statement I is correct but Statement II is incorrect
(c) Statement I is incorrect but Statement II is correct
(d) Both Statement I and Statement 11 are correct

153. Jurassic period of the mesozoic era was characterised by

(a) Radiation of reptiles and origin of mammal-like reptiles
(b) Dinosaurs become extinct and angiosperms appeared
(c) Flowering plants and first dinosaurs appeared.
(d) Gymnosperms were dominant plants and first birds appeared.

154. In history of biology, human genome project led to the development of:

(a) biotechnology
(b) biomonitoring
(c) bioinformatics
(d) biosystematics

155. Oxygen dissociation curve of haemoglobin is

(a) Sigmoid
(b) Hyperbolic
(c) Linear
(d) Hypobolic

156. Assertion: Fatigue is inability of muscle to relax.
       Reason: It is due to lactic acid accumulation by repeated contractions. In the light of the above statements, choose the correct answer from the options given below:

(a) Both (A) and (R) are correct but (R) is not the correct explanation of (A)
(b) (A) is correct but (R) is not correct
(c) (A) is not correct but (R) is correct
(d) Both (A) and (R) are correct.

157. Intercostal muscles are found attached with

(a) diaphragm
(b) ribs
(c) pleura
(d) lungs

158. Eustachian lube connects

(a) External ear with middle ear
(b) External ear with internal ear
(c) Middle ear with pharynx
(d) Internal pharynx

159. Match Column-I with Column-ll and select the correct option from the codes given below:

160. Which one of the following is not a second messenger in hormone action?

(a) Calcium
(b) Sodium
(c) cAMP
(d) cGMP

161. A genetically engineered bacteria used for clearing oil spills is:

(a) Escherischia coll
(b) Bacillus subtil is
(c) Agrobacterium tumifaciens
(d) Pseudomonas putida

162. What is true about T-lymphocytes in mammals?

(a) These are produced in thyroid
(b) There are three main types — cytotoxic T-cells, helper T-cells and suppressor T-cells
(c) These originate in lymphoid tissues
(d) They scavenge damaged cells and cellular debris

163. The use of Cannabis products (bhang, ganja, charas, marijuana or hashish) causes

(a) depression of brain activity and feeling of calmness
(b) alters thoughts, perceptions and feelings
(c) suppresses brain function and relieves pain
(d) stimulates the nervous system and increases alterness and activity.

164. Match the column I (various phase of an action potential) with column II (ionic activity associated) and choose the correct option.

165. Carcinoma refers to

(a) benign tumours of the connective tissue
(b) malignant tumours of the connective tissue
(c) malignant tumours of the skin or mucous membrane
(d) malignant tumours of the colon

166. Statement I: Malignant tumors normally remain confined to their original location, do not spread to other body parts and cause less damage.
       Statement II: Cancer arising from epithelial tissue of internal organs and glands is referred to as sarcoma. In the light of the above statements, choose the correct answer from the options given below:

(a) Both Statement I and Statement II are incorrect
(b) Statement I is correct but Statement II is incorrect
(c) Statement 1 is incorrect but Statement II is correct
(d) Both Statement I and Statement II are correct

167. the number of floating ribs, in the human body, is

(a) 6 pairs
(b) 5 pairs
(c) 3 pairs
(d) 2 pairs

168. Which one of the following statements is correct?

(a) Cro-Magnon man’s fossil has been found in Ethiopia
(b) Homo erectus is the ancestor of man
(c) Neanderthal man is the direct ancestor of Homo sapiens
(d ) Australopithecus is the real ancestor of modern man

169. Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of:

(a) Inspiratory Reserve Volume
(b) Tidal Volume
(c) Expiratory Reserve Volume
(d) Residual Volume

170. The nerve centres which control the body temperature and the urge for eating are contained in:

(a) hypothalamus
(b) pons
(c) cerebellum
(d) thalamus

171. Column-I contains organisms and column-II contains their excretory structures. Choose the correct match form the options given below:

172. Match Column-I with Column-II and select the correct option from the codes given below:

173. Match the column I w ith column II and mark the answer:

174. Which of the following statements are incorrect?
(i) Genetic engineering is also called recombinant DNA technology
(ii) Bacteriophage is not used as vecto
(iii) MALAYALAM is a palindrome.
(iv) Ethidium bromide cannot be used for staining DNA.
(v) Restriction endonuclease functions by inspecting the length of DNA sequence.

(a) (i)and(ii)
(b) (ii)and(iv)
(c) All of these
(d) None of these

175. Which one of the following is a correct matching pair?

(a) Lubb – Sharp closure of AV valves at the beginning of ventricular systol
(b) Dup – Sudden opening of semilunar valves at the beginning of ventricular diastole.
(c) Pulsation of the radial artery valves in the blood vessels.
(d) Purkinje fibers – Initiation of the heart beat

176. Which one of the components of ECG in human is correctly interpreted below?

(a) Complex QRS-One complete Pulse
(b) Peak T – Initiation of total cardiac contraction
(c) Peak P and Peak R together-Syslolic and diastolic blood pressures
(d) Peak P- Initiation of left atrial contraction only

177. Which of the following statement is correct regarding blood cells?
(i) A healthy individual has 12-16 gms of haemoglobin in every 200ml of blood.
(ii) RBC as an average life span of 120 days after which they are destroyed in the spleen.
(iii) Neutrophils and basophils are phagocytic cells which destroy foreign organisms entering the body
(iv) A reduction in the number of WBC leads to clotting disorders which will lead to excessive loss of blood from the body.

(a) Only (i) and (ii)
(b) Only(ii)
(c) Only (iii) and (iv)
(d) Only (i) and (iv)

178. In hormone action, if receptor molecules are removed from target organ, the target organ will

(a) continue to respond to hormone.
(b) not respond to hormone.
(c) continue to respond but requires higher concentration.
(d) continue to respond but in the opposite way.

179. Functional residual capacity in human is the amount of air

(a) that can be tilled in lungs by forceful inspiration.
(b) that can be breathed out after forceful expiration.
(c) that remains in the lungs after normal expiration.
(d) that remains in the lungs after forceful expiration.

180. The figure shows a human blood cell. Identify it and give its characteristics.

107. What is the end product of glycolysis of a glucose molecule?

(a) Fructose 1,6- diphosphate  
(b) Pyruvate and ATP
(c) Phosphoglyceraldehyde     
(d) Lactic acid and ATP