Question 3 :
Primary structure of protein is due to the presence of ______.

Question 5 :
<p>The interphase is divided into three main phases. There phases are</p>

Question 8 :
<p>Read the following statements and identify the correct option given.</p><p>I. In prokaryotic cell, the nuclear membrane, chloroplast, mitochondria, </p><p> microtubules and different kinds of pili are absent.</p><p>II. In eukaryotic cell, the nuclear membrane, chloroplast, mitochondria and pili are present.</p><p>III. In prokaryotic cell, the ribosome is of 70 S type and in mitochondria of </p><p> eukaryotic animal cell, the ribosome is 80 S type </p>

Question 12 :
Match the Column I with Column II -<table><tr><td></td><td></td></tr><tr><td>1</td><td>Terminalization of chiasmata </td><td>A.Zygotene </td></tr><tr><td>2</td><td>Synapsis </td><td>B.Diplotene </td></tr><tr><td>3</td><td>Crossing over </td><td>C.Metaphase I </td></tr><tr><td>4</td><td>Dissolution of synaptonemal complex </td><td>D.Diakinesis </td></tr><tr><td>5</td><td>Best stage for the study nucleolus disappear </td><td>E.Pachytene </td></tr><tr><td>6</td><td>Nuclear membrane and nucleolus disappear </td><td></td></tr><tr><td>7</td><td>Tetrads are arranged on equatorial line </td></tr></table>

Question 13 :
Match column-I (cell organelle) with column-II membrane and select the correct option from the codes given below. <table><tr><td>Column-I</td><td>Column-II</td></tr> <tr><td>A. Mitochondria</td><td>I. Without membrane</td></tr> <tr><td>B. Lysosomes</td><td>II. Single membrane</td></tr> <tr><td>C. Ribosomes</td><td>III. Double membrane</td></tr></table>

Question 15 :
<p>The <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ece476e189adb573a5d3676"/>-pleated sheet structure found in proteins is due to</p>

Question 16 :
Assertion : Enzyme substrate complex remains throughout the reaction.<br>Reason : The greater the affinity of the enzyme for a substrate, the higher is the catalytic activity.

Question 18 :
A stage in cell division is shown in the figure. Select the answer which gives correct identification of the stage with its characteristics<br /><img style='object-fit:contain' class="uploaded-image" src="https://storage.googleapis.com/teachmint/question_assets/NEET/5f27bbe7d1e44d5ba3a3be42" />

Question 19 :
{tex} \mathrm {Assertion}{/tex} : During anaphase, centromere of each chromosomes splits and chromatids separate. <br>{tex} \mathrm {Reason}{/tex} : Chromatids move to opposite poles.

Question 21 :
<p>Which one of the following precedes re-formation of the nuclear envelope during M-phase of the cell cycle?</p>

Question 23 :
<p>During which stage of meiosis, do tetrads line up at the equator?</p>

Question 24 :
Choose the option that correctly identifies the chemical bonds present in the given biomolecules.<br>Polysaccharides -A, Proteins -B, Fats -C, Water -D<br>|A|B|C|D|

Question 26 :
<p>Which of the following statements are correct for meiosis?</p><p>I. Meiosis is a double division. It gives rise to four cells</p><p>II. The cells undergoing meiosis may be haploid or diploid</p><p>III. No bouquet stage is recorded</p><p>IV. Pairing or synapsis of homologous chromosomes takes place during zygotene of prophase-I and continues upto metaphase-I</p><p>Option containing correct statement is</p>

Question 27 :
The DNA content of individual cells and the number of cells in each phase of a "cell cycle" can be determined using flow cytometry. Which of the following combinations of "phase of a cell cycle and its corresponding DNA content" can be considered normal?<br>(a)Diploid cells found in the G₀ or G₁ phase. <br>(b)Cells with twice the normal DNA content in the early M phase. <br>(c)Cells with intermediate amounts of DNA in the S phase. <br>(d)Cells with twice the normal DNA content in the G₂ phase

Question 29 :
The chromosomes in which centromere is situated close to one end are

Question 37 :
A plant has a number of chromosome groups arranged at the equatorial plane of metaphase-I whose 2n = 50; the number of chromosomes visible will be:

Question 39 :
In which stage of the cell cycle histone proteins synthesized in a eukaryotic cell?

Question 40 :
Which one of the following organelles is located near the nucleus and contains a collection of flattened membrane bound cistemae? (1994)

Question 41 :
Name the scientist who for the first time isolated and purified the enzyme urease in crystalline form from Jack bean (Canavalia ensiformis)

Question 43 :
Enzymes often have additional parts in their structures that are made3 up of molecules other than protein. When this additional chemical part is an organic molecule, it is called

Question 45 :
A cell in mitotic prophase can be distinguished from a cell in meiotic prophase by

Question 46 :
Which mineral element is essential for the activity of aconitase enzyme

Question 48 :
Identify the meiotic stage in which the homologous chromosomes separate while the sister chromatids remain associated at their centromeres.

Question 49 :
Which of the following coenzyme is a derivative of pantothenic acid (Vitamin B complex)

Question 52 :
Which one is correct about bivalent ? <br>(i) Bivalent are tetrads. <br>(ii) A bivalent means 4 chromatids and 2 centromere. <br>(iii) One bivalent consists of 2 homologous chromosomes each and sister chromatids. <br>(iv) Bivalents formation occurs in zygotene.

Question 56 :
Huge amount of starch is deposited in potato tubers due to

Question 60 :
The given figure shows three velocity- substrate concentration curves for an enzyme reaction. What do the curves x, y and z depict respectively? <br>and z depict respectively?<br><img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/NEET/5e6f4233146e730c5ca5b312' height='266' width='436' >

Question 61 :
<p> <font face="Cambria Math, serif">The regulation of the chemical composition of blood and body fluids and other aspects of its internal environment by an organism to maintain the physiological process is called</font></p>

Question 63 :
<p>Name the structural formulae of the given structures correctly</p><p><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ece47700e3719389a31f62b"/></p>

Question 65 :
Assertion (A) A coenzyme or metal ion that is very tightly bound to enzyme protein called prosthetic group. <br>Reason (R) A complete, catalytically active enzyme together with its bound prosthetic group is called apoenzyme.

Question 66 :
<p> <font face="Cambria Math, serif">Cell organelle common in Monera and Protista is</font></p>

Question 68 :
How many statements are incorrect about centrosome ? <br>(i)Peripheral microtubules are arranged as triplet <br>(ii)Centrioles are not self duplicating units <br>(iii)Peripheral microtubules are linked to each other by radial spokes <br>(iv)Central part does not have any microtubules

Question 70 :
<p>Lipids are generally</p><p>I. water soluble</p><p>II. water insoluble</p><p>III. soluble in non-polar organic solvents</p><p>IV. not soluble in non-polar organic solvents</p><p>Choose the correct options</p>

Question 75 :
<p> <font face="Cambria Math, serif">One of the nucleotides of DNA is</font></p>

Question 79 :
<p>Choose the correct option representing X and Y in the given graph</p><p><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ece474a0e3719389a31f5ff"/></p>

Question 80 :
Carbohydrates are commonly found as starch in plants storage organs. Which of the following five properties of starch (1-5) make it useful as a storage material? <br>1. Easily translocated <br>2. Chemically non-reactive <br>3. Easily digested by animals <br>4. Osmotically inactive <br>5. Synthesized during photosynthesis <br>The useful properties are

Question 84 :
<p> <font face="Cambria Math, serif">Which of the following is responsible for the origin of lysosome?</font></p>

Question 85 :
<p> <font face="Cambria Math, serif">According to cell doctrine, which of the following statements are incorrect?</font></p> <p> <font face="Cambria Math, serif">I. The bodies of all living beings are made up of cells and their products</font></p> <p> <font face="Cambria Math, serif">II. Cells are the basic units of structure in the body of living organisms</font></p> <p> <font face="Cambria Math, serif">III. Cells are the basic units of function in living organisms that is, the activities of an organisms are the sum total of the activities of its cells</font></p> <p> <font face="Cambria Math, serif">IV. Genetic information is stored and expressed inside the cells</font></p> <p> <font face="Cambria Math, serif">Choose the correct option</font></p>