Question 3 :
The barrier inside the root that prevents water from leaking out of the vascular tissue is the -

Question 4 :
One set of the plant was grown at 12 hours day and 12 hours night period cycles and it flowered while in the other set night phase was interrupted by flash of light and it did not produce flower.Under which one of the following categories will you place this plant?

Question 5 :
{tex}\mathrm{Assertion : }{/tex} The proton gradient is broken down due to the movement of protons across the membrane to stroma through the transmembrane channel of the F₀ of the ATPase. <br>{tex}\mathrm{Reason : }{/tex} It is the breakdown of proton gradient that leads to release of energy.

Question 6 :
A student sets up an experiment on photosynthesis and it is as follows : He takes soda water in a glass tumbler and adds chlorophyll extract into the contents and keeps the number exposed to sunlight, hoping that he has provide the necessary ingredients. What will happen after, say, a few hours of exposure to light? Choose the correct answer.

Question 7 :
<p>In most of the higher plants, the growing …A… bud inhibits the growth of …B… bud, a phenomenon called apical dominance. Removal of the shoot tips usually results in growth of …C… buds.</p><p>Complete the given statement with the correct combination of options given in the codes below</p>

Question 11 :
In {tex} \mathrm { C } _ { 4 } {/tex} plants, {tex} \mathrm { CO } _ { 2 } {/tex} combines with

Question 13 :
In a chloroplast the highest number of protons are found in

Question 17 :
{tex}\mathrm {Assertion}{/tex} : As a whole plant growth is indefinite. <br>{tex}\mathrm {Reason}{/tex} : Plants retain the capacity of continuous growth throughout their life.

Question 18 :
By hormone application it is possible to obtain seedless fruits. In which of the following it is desirable to obtain seedless fruits

Question 19 :
{tex}\mathrm {Assertion}{/tex} : Ammonia is converted into nitrate by soil bacteria like Nitrosomonas and Nitrobacter. <br>{tex}\mathrm {Reason}{/tex} : These nitrifying bacteria are photoautotrophs.

Question 20 :
{tex}\mathbf{Assertion}{/tex} : There is a decrease in photosynthesis, if the photosynthetic cells are illuminated by light of P₆₈₀ nm or more wavelength.<br>{tex}\mathbf{Reason}{/tex} : In red drop phenomenon the rate of photosynthesis decreases.

Question 23 :
I. One maize root cell can give rise to more than 17,500 cells <br />II. A cell in watermelon can increase in size upto 350000 times <br />III. The growth of pollen tube is measured in length <br />IV. The growth of the leaf is measured in term of volume

Question 25 :
{tex}\mathbf{Assertion}{/tex} : The concentration of O₂ in the atmosphere is inhibitory to photosynthesis.<br>{tex}\mathbf{Reason}{/tex} : Oxygen inhibitory effect is due to Warburg effect.

Question 26 :
Which of the enzyme is involved in the conversion of 3PGA to 3PGAL

Question 27 :
<p>RQ value of 4 may be expected for the complete oxidation of which one of the following?</p>

Question 29 :
<p>Which of the following movement in plants is not related to change in auxin level?</p>

Question 30 :
Consider the following statements with respect to photosynthesis and identify the correct statements. <br>(i) The first carbon dioxide acceptor in C{tex}_4{/tex} cycle is PGA. <br>(ii) In C{tex}_3{/tex} plants, the first stable product of photosynthesis during dark reaction is RuBP. <br>(iii) Cyclic photophosphorylation results in the formation of ATP. <br>(iv) Oxygen which is liberated during photosynthesis comes from water.

Question 31 :
<p> <font face="Cambria Math, serif">Which of the following is a 4-carbon compound?</font></p>

Question 33 :
<p> <font face="Cambria Math, serif">Among the following, identify the substrate required for the only oxidative reaction that occurs in the process of glycolysis.</font></p>

Question 35 :
<p> <font face="Cambria Math, serif">Respiratory Quotient (RQ) is one in case of </font> </p>

Question 38 :
<p>The number of essential elements known for the growth and reproduction of plants is</p>

Question 41 :
{tex}\mathbf{Assertion}{/tex} : The mode of nutrition in higher animals is heterotrophic. <br>{tex}\mathbf{Reason}{/tex} : Animals can use different trophic levels for heterotrophic nutrition.

Question 42 :
Protection of the walls of the stomach against the action of its own digestive juices

Question 46 :
<p>Which one of the following does not act as a neurotransmitter?</p>

Question 49 :
<p>In reptiles and amphibians, there is no clear cut separation of oxygenated and deoxygenated blood because they have</p>

Question 52 :
<p>The deposition of lipids on the wall lining, the lumen of large and medium-sized arteries is referred to as </p>

Question 53 :
Kidneys are not the only organs of excretion; their work is supplimented by

Question 55 :
Which one of the following four organs of respiratory system is correctly matched with its characteristics?<br />A. Bronchi &ndash; Two branches of the trachea that brings air into the lungs. <br />B. Trachea &ndash; Small flap that prevents food from entering <br />C. Diaphragm &ndash; Dome shaped muscle that pushes on the lungs during exhalation. <br />D. Alveoli &ndash; Pair of organs that inflate as you inhale and deflate as you exhale.

Question 56 :
<b>Assertion</b> : Starch is hydrolysed by ptyalin to maltose. <br><b>Reason</b> : Sucrase hydrolyses sucrose to lactose.

Question 57 :
<b>Assertion</b> : Kidney maintains the osmotic concentration of the blood. <br><b>Reason</b> : Kidney eliminates either hypotonic or hypertonic urine according to the need of the body.

Question 58 :
Match the column I (various phase of an action potential) with column II (ionic activity associated) and choose the correct option. <table> <tbody> <tr> <td>Column I</td> <td>Column II</td> </tr> <tr> <td>A. Resting stage of a neuron</td> <td>I. Opening and then&nbsp; closing of the sodium channels</td> </tr> <tr> <td>B. Depolarization phase&nbsp;&nbsp;in the generation of an action potential.</td> <td>II. All voltage gated sodium and potassium channels&nbsp; are closed.</td> </tr> <tr> <td>C. Repolarization phase in the generation of an action potential.</td> <td>III. The sodium channels remain opened.</td> </tr> <tr> <td>D. Absolute refractory phase.</td> <td>IV. Opening of potassium gates and the rushing of potassium</td> </tr> </tbody> </table>

Question 60 :
<b>Assertion</b>: A sigmod curve is obtained when percentage saturation of haemoglobin with O{tex}_2{/tex} is plotted against the pO{tex}_2{/tex} <br><b>Reason</b>: Every 100 mL of oxygenated blood can deliver around 5mL of O{tex}_2{/tex} to the tissues under normal physiological conditions.

Question 61 :
The correct statement in respect of protein haemoglobin is that it

Question 64 :
<p>A man is admitted in a hospital. He is suffering from an abnormally low body temperature, loss of appetite and extreme thirst. His brain scan would probably show a tumour in </p>

Question 67 :
Ratio of oxyhaemoglobin and haemoglobin in the blood is based upon

Question 68 :
<p> <font face="Cambria Math, serif">Which of the following is correct regarding electrical synapses?</font></p> <p> <font face="Cambria Math, serif">I. Pre and postsynaptic membrane neurons are in very close proximity at electric synapse</font></p> <p> <font face="Cambria Math, serif">II. Electric current are involved in the transmission of impulses</font></p> <p> <font face="Cambria Math, serif">III. Transmission of an impulse across electrical synapses is very similar to impulse conduction along a single axon</font></p> <p> <font face="Cambria Math, serif">IV. Impulse transmission is always faster in electric synapse than that across a chemical synapse</font></p> <p> <font face="Cambria Math, serif">V. Electrical synapses are rare in our system</font></p> <p> <font face="Cambria Math, serif">The correct option is</font></p>

Question 69 :
Select the correct option regarding A, B and C.<br />&nbsp;<img style='object-fit:contain' class="uploaded-image" src="https://storage.googleapis.com/teachmint/question_assets/NEET/5f27cb0cd1e44d5ba3a3beb3" />

Question 70 :
<p> <font face="Cambria Math, serif">Study thoroughly the following statement and identify which of the following is/are correct and incorrect?</font></p> <p> <font face="Cambria Math, serif">I. Bile salt present in bile is responsible to emulsify the fats in small intestine</font></p> <p> <font face="Cambria Math, serif">II. Bicarbonates of sodium, potassium, glycocholate and faurocholate of sodium are bile salts</font></p> <p> <font face="Cambria Math, serif">III. The pH of hepatic bile is 8.6, while pH of gall bladder is 7.6 or 7.5</font></p> <p> <font face="Cambria Math, serif">IV. The flow of bile from liver takes place through hepatic duct, common bile duct, -hepatopancreatic ampulla and finally to the first part of small intestine</font></p> <p> <font face="Cambria Math, serif">V. Gall bladder in rat and horse does not store bile</font></p> <p><font face="Cambria Math, serif">Choose the correct option</font></p>

Question 71 :
<p> <font face="Cambria Math, serif">What does diagram </font> <img style='object-fit:contain' align="absmiddle" src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ff6ee508a225109bd1660e9"/> <font face="Cambria Math, serif"> and </font> <img style='object-fit:contain' align="absmiddle" src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ff6ee518a225109bd1660ea"/> <font face="Cambria Math, serif"> indicates?</font></p> <p> <img style='object-fit:contain' align="bottom" src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ff6ee73fab6285fe9b5a149"/> </p> <p> <font face="Cambria Math, serif">Choose the correct combination</font></p>

Question 72 :
<p> <font face="Cambria Math, serif">Which of the following organs can be called a sort of ‘blood bank’?</font></p>

Question 76 :
<p> <font face="Cambria Math, serif">Which of the following is right about blood coagulation?</font></p> <p> <font face="Cambria Math, serif">I. Vitamin-B is necessary for the formation prothrominase</font></p> <p> <font face="Cambria Math, serif">II. Conversion of fibrin to fibrinogen</font></p> <p> <font face="Cambria Math, serif">III. Conversion of prothrombin to prothrombinase</font></p> <p> <font face="Cambria Math, serif">The option with correct combination is</font></p>

Question 79 :
<p> <font face="Cambria Math, serif">The digestion of starch by amylase is completed in the</font></p>

Question 80 :
<p> <font face="Cambria Math, serif">By which mechanism, oxygen is transported from lungs to cells?</font></p>

Question 81 :
Which of the following pair of hormone and their disorder is correctly matched ?