NEET Biology Online Mock Test For Full Syllabus Set A

1. Identify the correct statement

2. Sieve plate is found as

3. Characteristics present in meristematic cells are

4.

5. What is/are true about heart wood
(1) It does not help in water conduction
(2) It is also called alurnum
(3) It is dark in colour but very soft
(4) It has tracheary element which are filled with tannin, resin, etc.

6.

7. The number of stomata and epidermal cells in 1 mm2 leaf area of lower epidermis of the leaves of X, Y and Z plants are given below. Arrange the plants in decreasing order of theirstomatal index.

8. barley stem, vascular bundles are

9. Heartwood differs from sapwood in

10. Study the following statements and choose the correct option.
I. Buds are present in the axil of leaflets of the compound leaf.
II. Pulvinus leaf-base is present in some leguminous plants.
III. In Alstonia, the petioles expand, become green and synthesize food.
IV. Opposite phyllotaxy is seen in guava.

11. The photosynthetic-or assimilatory roots are observed in

12. Assertion: An ascending taxonomic sequence of Gossypium herbaceum indicates its placement in progressively higher groups.
Reason: Ascending taxonomic hierarchy indicates that a taxon is treated as belonging to a number of taxa.

13. Parachute mechanism of seed dispersal is seen in

14. Study the following columns and choose the correct matching

 

 

 

15. The hard cuticle of body wall of arthropods restricts growth and is periodically changed during growth. The process is called

16. Which of the following groups of structures/organs have similar function?

17. When two stamens are short and two are long, they are

18. Flowers and stamens of composite are

19. The cephalochordates

20. Which of the following characters is not related to Aves

21. Ascaris and Anopheles are similar in

22. In which one of the following sets of animals to all the four give birth to young ones?

23.

24.

25. The Desulfovibrio bacterium breaks down organic matter (which it must have) and uses sulphate (not oxygen) as an electron acceptor. As a result, it produces hydrogen sulphide (H₂S) accounting for the ‘rotten egg” smell of swamp mud, oxygen is a deadly poison to Desulfovibrio. We would call Desulfovibrio.

26. Most common method of vegetative reproduction in thalloid bryophytes is

27. The explanation for occurrence of ciliated motile sperms in xerophytic Cycas is:

28. Pigments present in chloroplast of Ulothrix are:

29. Life cycle of Funaria is not completed without water

30. The given figure shows some types of inflorescences. Select the option that correctly identifies them.  

31. The two layers of teeth in peristome of a moss are

32. Mark the correct labeling in the given floral diagram.

33. Bacteria are grouped under four categories according to their shape. Study the given figures and select the correct option regarding this.

                      

                      

                      

                      

34. Interval between infection and appearance of disease is called

35. Which of the following types of flagella is shown in given figure?

36.

37. Severe Acute Respiratory Syndrome (SARS)

38. Which one of the following is heterosporous?

39. Mark the correct labelling in the T₄ bacteriophage from top to the bottom.

40. Which of the following represents the genetic material (RNA) in given figure?

41. Choose the correct sequence in the hierarchy of taxonomic categories in descending order.

42. Assertion: “The Biological Species” concept helps us to ask how species are formed.
Reason: The concept of biological species focuses our attention on the question of how reproductive isolation comes about.

43. Biosystematics aims at

44. ____i____ is the branch of science which deals with classification of organisms based on their ____ii____ relationship.
Note: Options are given in horizontal row

45. The first word in a biological name of an organism represents the ___i___, which always start with a ___ii___letter.

46. The scientific name for potato is correctly written as

47. Which of the following statements about macronutrients and micronutrients is correct?

48. The given table enlists some microorganisms and the step in which they are involved during theprocess of nitrogen cycle.

49. Nitrogen cycle involves many compounds. Which illustration correctly depicts the nitrogen cycle?

50. Nitrifying bacteria

51. Which element is located at the centre of the porphyrin ring in chlorophyll?

52.

53. _____i____is the process of conversion of ammonia into amino acids in plants during which the amino group from one amino acid gets transferred to keto group of a keto acid. The reaction is catalyzed by the enzyme _____ii____. The information in which alternative completes the given statements?

54. Which one of the following statements is wrong?

55. When the plant cell is placed in _____i____ solution such as concentrated salt solution, the cell membrane of plant cells shrinks and the cell becomes _____ii____. The information in
which alternative completes the given statement?

56. Which of the following statements is/are not true?
I. In CAM plants, stomata open during dark and remain closed during the day.
II. Role of Na+ in stomatal opening is now universally accepted.
III. The water potential of root cells is higher than the water potential of soil.
IV. Capillarity theory is the most accepted theory of water movement through plants.
V. The walls of xylem vessels made up of lingo-cellulose have strong affinity for water molecules.

57. Which of the following is correct?

58. Which of the following experiments is called physiological demonstration of osmosis?

59. The given figure shows a plant cell placed in a sugar solution. The osmotic potential on either side of the cell membrane is shown.   Which of the following statements regarding the movement of water with respect to the plant cell is correct?

60.

61. The information in which alternative completes the given table?

62.

    

 

 

 

63.

64. The number of mitotic cell divisions required to produce 256 cells from single cell would be

65. There are three genes a, b, c with percentages of crossing over between a and b is 20% b and c is 28% and a and c is 8%. What is the sequence of genes on chromosome?

66.

67. During Meselson and Stahl’s experiments, heavy DNA was distinguished from normal DNA by centrifugation in

68. Given below are two statements A and B. Choose the correct answer related to the statements.
Statement A. Amino acids are amphoteric in their function.
Statement B. All amino acids are necessary for our body

69. Match the column I with column II and select the correct option.

 

 

 

70. Assertion- Arachidic acid is an unsaturated fatty acid.
Reason- There are one or more double bonds between carbon atoms in unsaturated fatty acids

71. Which one of the following structural formulae of two organic compounds is correctly identified along with its related function?

72.

73.

74.

75. Which of the following structural components of chloroplasts contain photosynthetic pigments?

76. The golgi components are bound by

77. An exception to cell theory is

78. There are two cells, A and B, isolated from different sources. Both the cells have genetic material, lipids in their membranes, and enzymes for energy production. Cell A has flagella, which is absent in cell B. Cell A has plasmids, while cell B has endoplasmic reticulum. Both cells lack chlorophyll and cellulose.
A and B are ____I____ and ____II____ cells respectively.
Which alternative correctly completes the given statement?

79. Keeping in view the ‘fluid mosaic model’ for the structure of cell membrane, which one of the following statement is correct with respect to the movement of lipids and proteins from one lipid monolayer to the other (described as flip-flop movement)?

80. Formula of chlorophyll ‘a’ is:

81. Some bacterial cells were fixed for microscopic observation. A certain labelled structure X was observed on most occasions at the cell membrane   In the given illustration, label X represents

82. How can you identify male and female cockroach –

83. Alimentary canal wall contains

84. Lateral oesophageal heart connects

85. Which of the following structures distinguish a male frog from a female frog?

86. The mouth parts of cockroach consist of _____i____, which forms the upper lip and _____ii____,
which acts as the lower lip. The information in which alternative completes the given statement?

87. Which of the following is a correct feature

88. The internal walls of the blood vessels and the ____i_____ contain ____ii_____muscles.

89. Note the following statements.
I.It forms the lining of the cavities of alveoli of the lungs.
II.It forms the lining of wet surfaces like buccal cavity and oesophagus.
III.It occurs in the ducts of sweat glands.
IV.It forms the lining of salivary glands and sweat glands.
V.It is a loose connective tissue.
Which of the above statements are associated with simple epithelial tissue?

90. The following is a diagram of the just spawned frog’s egg; with the parts labelled from A to E. Identify the parts and choose the correct option from those given below.  

91. Which one of the following is the correct pairing of a body part and the kind of muscle tissue that moves it?

92. From evolutionary point of view, tracheids and sieve cells are more primitive than tracheae and sieve tubes respectively. The angiosperms have

93. The reabsorption of sodium and water in the distal convoluted tubule, which leads to an increase in blood pressure, is a result of the secretion of

94. Which part of the kidney plays a role in removing the waste products of metabolism from blood plasma ?

95. Which of the following substances is found in urine under normal conditions?

96. Which of the following conditions would lead to a decrease in the rate of glomerular filtration?

97. Which term is used for referring to the cortex that extends into renal medulla as renal column?

98. The change that occurred in red blood cells after they were kept in a beaker containing distilled water for 10 minutes is illustrated in the given figure.   Which of the following inferences can be drawn from the observation?

99. The Rh incompatibility can be seen between Rh ____i____ blood of pregnant mother and Rh _____ii____ blood of foetus. The information in which alternative completes the given statement?

100. Blood group-incompatibility can be observed between

101. Which of the following arrow diagrams correctly represents the flow of cardiac impulse in the heart?

102.   In which alternative are the structures correctly matched with the respective labels that represent them?

103. Which of the following effects is not likely to be a consequence of smoking?

104. Proportion of volume of carbon dioxide released to volume of oxygen absorbed during respiration is

105.

106. The given figure illustrates the changes in lung volume during the process of breathing The change from II to III indicates the

107.

108. Which of the following equations is correct?

109. The given table enlists various types of dietary nutrients and the enzymes that are used in the process of digestion of these nutrients in the body

110. During prolonged fasting

111. The part labelled X in the given diagram A is removed from a patient’s body because of some malfunctioning.
How will the given condition affect the process occurring in the structure given in diagram B?  

112. Which of the following processes is an example of physical digestion?

113. Which arrow diagram represents the sequence of layers in the wall of alimentary canal from the outermost to the innermost?

114. The given diagram illustrates phototropism in a plant. Which plant hormone induces the phenomenon of phototropism in plants?

115. Morphogenesis is the process of differentiation of tissues and organs in plants. Which ratio of hormones induces plant cell differentiation?

116.

117. If a leaf segment of Bryophyllum plant is in soil, it produces new plants. This is because its leaf has

118. Which of the following movements is not related to change in auxin levels ?

119. Levitt performed experiments. He observed that auxin treated cells were able to absorb water even when kept in hypertonic solution. Which explains this observation best?

120. Gibberellic acid induces flower

121. Four potted plants I, II, III, and IV (of short day plant, which has the critical period of 14 hours) are taken and exposed to light for different time periods as listed in the given table. Which potted plant will show flowering after exposure to light?

122.

123. Which arrow diagram traces the sequence of electrons in the electron transport system during the oxidation of NADH molecule?

124. In oxidation of one molecule of glucose during respiration, 36 molecules of ATP are liberated as follows

125. Which of the following takes place in Krebs’ cycle?

126. During anaerobic respiration in yeast

127.

128. During glycolysis, the fructose-6-phosphate is converted to fructose-1,6-diphosphate in the presence of ATP and the enzyme phospho-fructokinase. What is the described reaction known as?

129. Most plants are green in colour because

130. The correct molecular formula of chlorophyll-a is

131. Which is the correct equation of photosynthesis?

132. Anthony and his classmates decided to study the effect of amount of carbon dioxide on the growth of plants. For this purpose, they grew sugarcane in controlled environment and measured the amount of sugar content at different concentrations of carbon dioxide. Which graph represents the sugar content in sugarcane and the concentration of carbon dioxide correctly?

133. C₃ pathways require ____I____ ATP for CO₂ fixation while C₄ pathways require ____II____ ATP or CO₂ fixation. Which of the following alternative complete the statement above?

134. The enzyme RuBisCo acts as an oxygenase when the

135. There are two groups of photosystems that take part in photosynthesis, photosystem I and photosystem II. Which of the following statements represents the major difference between
photosystem I (PS I) and photosystem II (PS II)?

136.

137.

138. What is the excretory organ of crustaceans?

139. Which part of the kidney plays a role in removing the waste products of metabolism from blood plasma?

140. In old age, the vision of eye becomes dim. It is due to

141. The hormones labelled, I, II, III, and IV, are secreted by the respective organs listed in the table The information in which alternative correctly matches the secretions (hormones) by the respective organs?

142. Aldosterone is the hormone that regulates the rate of reabsorption of sodium ions from the filtrate   Which label represents the gland that secretes aldosterone?

143. The given diagram illustrates a section of an adrenal gland.   Which of the following hormones is secreted by the structure labelled as “X” in the diagram?

144. During the transmission of nerve impulse through a non-myelinated nerve fibre, the potential on the inner side of the nerve fibre in resting, depolarized, and repolarized states respectively will be

145. The given image is that of a neuron   In which sequence does an impulse on reaching this neuron travel through it?

146.

147. Myelinated nerve fibres contain myelin sheath, which is made up of Schwann cells. The propagation of nerve impulse through a myelinated nerve fibre is illustrated in which diagram?

148. The given diagram illustrates the structure of a neuron. Which labelled structure in the given diagram represents Nodes of Ranvier?

149. The illustration represents a type of neuron. The illustration represents which type of neuron?

150. Physical exercise stimulates various factors that increase heartbeats. Which of the following systems is directly stimulated by physical exercise?

151. Which potted plant will show flowering? The information in which alternative completes the given flowchart?

152. Which of the following statements about transmission of impulse is correct?

153. The image illustrates the movement of an impulse in a nerve fibre. The labels, I, II, and III, represent the changes present on either sides of the membrane. When an action potential is generated, because of movement of ions, a positive charge inside and negative charge outside is established.
Immediately after, the membrane returns to its original condition and is said to be repolarized. Resting membrane potential is established when the membrane gains positive charge outside and negative charge inside i.e., the membrane is said to be polarized.
The information in which alternative matches the labels with its respective names correctly?

154. The axonal membrane is said to be in depolarized state when

155. Which of the following events occurs during the process of repolarization?

156. The ions across the resting membrane are regulated by the sodium-potassium pump. The gaining of positive charge on the inner surface and negative charge on the outer surface of the membrane is maintained by the transport of

157. The illustration represents a type of neuron. The illustration represents which type of neuron?

158. Neuron is the basic unit of the nervous system. Which part of the neuron contains the synaptic vesicles?

159. Which of the following systems together controls and coordinates the physiological process?

160. Centrum of 8th vertebra of frog is

161. Joint between Malleus and incus is

162. Which alternative lists the names of the bones present in the hind limb?

163.

164. Which of the following statements regarding the functions of the vertebral column is incorrect?

165. Which of the following events does not occur during muscle contraction?

166. Muscle contains different types of proteins. These include actin, myosin, tropomyosin and troponin. The ATP binding site is present on the

167. During muscle contraction, the size of sarcomere _____i____ and the length of _____ii____ retains its original length. The information in which alternative completes the above statement?

168. During muscle contraction, the distance between adjacent Z lines _____i____ while there is no change in the length of _____ii____. The information in which alternative completes the given statement?

169. Which of the following statements regarding the characteristics of white muscle fibres is correct?

170. Which contractile protein contains the enzyme ATPase required for muscle contraction?

171. The functional unit of contraction between two successive Z-lines is known as

172. Four statements about muscle contraction:
I. During muscle contraction, the size of the H-space decreases.
II . During muscle contraction, the size of the sarcomere decreases.
III . During muscle contraction, the length of the A-band decreases.
IV . During muscle contraction, the distance between the adjacent Z lines decreases.
Among the given statements,

173. Which of the following pairs of muscles is involuntary in nature?

174. Which of the following statements is incorrect about visceral muscles?

175. Which of the following arrow diagrams correctly represents the movement of filtrate in nephrons to form urine?

176. The counter current system is a system in which the exchange of materials occurs between fluids flowing in opposite directions and separated by a semi permeable membrane. The counter current system in kidneys operates between the

177. Which of the following sequences correctly represents the process of urine formation?