Question 3 : Which of the following statements about the structure of proteins is true?

Question 14 : Which of the following element is present in all amino acids and absent in carbohydrates?

Question 23 : Hormones, enzymes and vitamins are included in same group of biochemicals because these all&#160;<br/>

Question 25 : Which of the following is an organic compound found in most cells?

Question 29 : Which one is the major globin present in adult human being

Question 30 : For growth of body and its repair one needs which of the following component?<br/>

Question 31 : Match the biological&#160;molecules listed with their function given; choose the answer which gives correct combination of alphabets of the two columns.&#160;<br/><table class="wysiwyg-table"><tbody><tr><td><b>Biological molecules</b></td><td><b>&#160; &#160; Function</b></td></tr><tr><td>A. Starch</td><td>p. Protein synthesis</td></tr><tr><td>B. Haemoglobin</td><td>q. Sex hormone</td></tr><tr><td>C. mRNA</td><td>r. Storage product</td></tr><tr><td>D. Steroid</td><td>s. Transport of gases</td></tr></tbody></table>

Question 32 : Insulin produced by $\beta$-cells in our body contains ............. amino acids

Question 34 : About protein, carbohydrates, lipids and nucleic acids, all things are common except.&#160;

Question 36 : The difference among species is due to the difference in its ________ components. <br>

Question 38 : Most diverse macromolecules, found in the cell both physically and chemically are?

Question 42 : In a lab situation, a student is asked to identify which macromolecule is found in 3 different solutions.<br/>Solution 1 contains a macromolecule that is composed of atoms of carbon, hydrogen, oxygen and nitrogen. It tests positive with&#160;Biuret solution.<br/>Solution 2 contains a macromolecule composed of carbon, hydrogen and oxygen in a 1:2:1 ratio. It tests positive with iodine-potassium&#160;iodide solution.<br/>Solution 3 contains a macromolecule that is composed of atoms of carbon, hydrogen, oxygen, and phosphorus.<br/>Which of these best identifies the macromolecule found in each solution?

Question 43 : Enzyme, vitamins and hormones can be classified into a single category of biological chemicals, because all of these

Question 45 : Which of the following statements are true?<br/>(a) Proteins are the heteropolymer of $\alpha $-amino acid.<br/>(b) Sugar found in nucleic acid, is in the form of $\beta $-form.<br/>(c) Nucleic acids show acidic nature.<br/>(d) 5-methyl uracil binds with first carbon atom of ribose sugar.<br/>(e) Collagen is most abundant protein in plant world.<br/>

Question 47 : Match the columns and choose the correct option.<br/><table class="table table-bordered"><tbody><tr><td>&#160;</td><td>&#160;Column I</td><td>&#160;</td><td>Column II<br/></td></tr><tr><td>&#160;A</td><td>&#160;Fructose</td><td>&#160;1</td><td>Disaccharide</td></tr><tr><td>&#160;B</td><td>Sucrose</td><td>&#160;2</td><td>Monosaccharide</td></tr><tr><td>&#160;C</td><td>&#160;Sodium taurocholate</td><td>&#160;3</td><td>Amino acid</td></tr><tr><td>&#160;D</td><td>&#160;Glycine</td><td>&#160;4</td><td>Bile salts</td></tr></tbody></table>

Question 48 : Which of the following is the least likely to be involved in stabilizing the three-dimensional folding of most proteins?

Question 50 : A peptide bond is found in which type of biological molecule

Question 51 : Match the biological molecule listed under column I with their biological function listed under column II. Choose the answer which gives the correct combination of alphabets of the two columns.<br/><table class="wysiwyg-table"><tbody><tr><td></td><td>Column I<br/>(Biological molecule)<br/></td><td></td><td>Column II<br/>(Function)<br/></td></tr><tr><td>A</td><td>Glycogen</td><td>1</td><td>Hormone</td></tr><tr><td>B</td><td>Globulin</td><td>2</td><td>Biocatalyst</td></tr><tr><td>C</td><td>Steroid</td><td>3</td><td>Antibody</td></tr><tr><td>D</td><td>Peptidase</td><td>4</td><td>Storage product</td></tr></tbody></table>

Question 52 : A student tested four unknown solutions of macromolecules with three reagents. She also tested the solubility of the solutions with water, a polar solvent, and hexane, a non-polar solvent. Her results are shown in the table below.<br><table class="wysiwyg-table"><tbody><tr><td>Solution</td><td>Benedict's Solution</td><td>Biuret Solution</td><td>Iodine</td><td>Iodine Solubility</td></tr><tr><td>1<br>2<br>3<br>4</td><td>yes<br>no<br>no<br>no</td><td>no<br>no<br>yes<br>no</td><td>no<br>yes<br>no<br>no</td><td>water<br>water<br>water<br>hexane</td></tr></tbody></table>Which of these correctly identifies the macromolecule found in each solution?<br><br>

Question 53 : Arrange the following compounds in descending order on the basis of number of carbon atoms present in them.<br>(A) Palmitic acid (B) Serine (C) Ribose (D) Arachidoric acid (E) Glucose <br>