Biomolecules Quiz-07

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NEET is the most famous and important medical entrance examination held in our country. This exam is an objective type, an offline test which includes 4 sections namely– Physics, Chemistry, Botany, and Zoology. The maximum marks that can be scored are 720 marks and have 180 questions. About half of the paper consists of questions from Biology, as the NEET exam essentially focuses on capacitating students to go for seats in medical courses. One of the most significant and crucial sections in the NEET exam is of Biology. It comprises of theories, descriptions, discoveries, diagrams, definitions, explanations of differences, and relations. The majority of the topics covered in the NEET syllabus are from the NCERT syllabus of Class 11 & 12 and other related sources become part of the rest of the syllabus. Clear Exam curates a list of articles selected by professionals who recommend the highly vital topics for NEET exams. The table below takes you directly to the respective topic where the in-depth article and the MCQs are available for an easy and productive learning experience. Prior to solving NEET question papers or practicing mock tests, you must ensure to study the basic concepts in NEET and practice a few sample questions related to this exam. Students will be covered for all their studies as the topics are available from basics to even the most advanced. .

Q1.   Identify the term ‘ash’ in term of living tissue sample analysis from the statements given below
  •  Organic compounds oxidised to gaseous form (CO_2 and water vapour) after burning of the tissue
  •  The material left after burning the tissue which contains inorganic elements (e.g., calcium, magnesium etc.)
  •  Compounds removed in the form of gases
  •  Compounds which may be soluble in intracellular fluid
(b) After burning the dry tissues, all the organic compounds are oxidised to gaseous form (CO_2 and water vapour) and are removed. The material left is termed ‘ash’ which contains inorganic elements (e.g., calcium, magnesium etc.)

Q2.   Pick out the wrong statement
  •  Amino acids are substituted methanes
  •  Glycerol is a trihydroxy propone
  •  Lysine is a neutral amino acid
  •  Lecithin is a phospholipid
(c) The chemical and physical properties of amino acids are essentially of the amino, carboxyl and the R functional groups. Based on number of amino and carboxyl groups, these are acidic (e.g., glutamic acid) and, basic (e.g., lysine) neutral (e.g., valine amino acids).

Q3.   Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these
  •  Enhance oxidative metabolism
  •  Are conjugated proteins
  •  Are exclusively synthesized in the body of a living organism as at present
  •  Help in regulating metabolism
(d) Enzymes, vitamins and hormones are helpful in metabolism regulation.
Q4.   Select the correct option that identifies the nature of apoenzyme and co-factor correctly Apoenzyme Co-factor
  •  Protein Non-protein
  •  Non-protein Protein
  •  Protein Protein
  •  Non-protein Non-protein
(a) Many enzymes show enzymatic (catalytic) activity only in association with certain non-protein substance. Such substances are called cofactor. Apoenzyme is the proteinaceous substance that combines with prosthetic group to form holoenzyme

Q5.   Read the two reaction A and B given below and select the correct option accordingly A. ADP + Pi → ATP B. ATP → ADP + Pi
  •  A-Endergonic; B-Exergonic
  •   A-Exergonic; B-Endergonic
  •  A-Endergonic; B-Endergonic
  •  A-Exergonic; B-Exergonic
  (a) ADP+P_i→ATP (endergonic) ATP→ADP+P_i (exergonic)

Q6.   An example of feedback inhibition is
  •  Cyanide action on cytochrome
  •  Sulpha drug on folic acid synthesizer bacteria
  •  Allosteric inhibition of hexokinase by glucose 6-phosphate
  •  Reaction between succinic dehydrogenase and succinate
(c) In feedback inhibition, the product of an enzyme-catalyzed reaction (chain of reactions) accumulates and acts as inhibitor of the reaction, e.g.,

Q7.   Table sugar consists of
  •  Lactose
  •  Sucrose
  •  Maltose
  •  glucose
(b) Sucrose is a sugar comprising one molecule of glucose linked to a fructose molecule. It is abundant in sugarcane, sugar beet, etc, from which it is extracted and defined as table sugar.

Q8.   A bond formed between carboxyl group of one amino acid and amino group of adjacent amino acid, is called
  •  Peptide bond
  •  Hydrogen bond
  •  Covalent bond
  •  All of these
(a) A peptide bond is a chemical bond formed between two molecules when the carboxyl group of one molecule reacts with the amino group of the other molecule; thereby releasing a molecule of H_2 O. This is a dehydration synthesis reaction and usually occurs between amino acids. The resulting bond is a peptide bond and the resulting molecules is an amide.

Q9.   Raffinose is a
  •  Monosaccharides
  •  Disaccharides
  •  Trisaccharides
  •  Polysaccharides
(c) Trisaccharides are composed of three monosaccharides. Raffinose is a common trisaccharide found in plant. On hydrolysis, it yields one molecule each of glucose, fructose and galactose.

Q10.   The type of bond involved in the formation of sodium chloride, is
  •  Ester bond
  •  Peptide bond
  •  Ionic bond
  •  Covalent bond
(c) Sodium chloride is formed by bonding between positively charged sodium ions (Na^+) and negatively charged chloride ions(Cl^-). The type of bonding between these ions is ionic bonding as ionic bonds are formed by the electrical attractions between ions bearing opposite charges (eg.,Na^+ and Cl^-).

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Biomolecules Quiz-07
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