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Biomolecules Quiz-06

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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.   An organic substance bound to an enzyme and essential for its activity, is called
  •  Coenzyme
  •  Holoenzyme
  •  Apoenzyme
  •  Isoenzyme
Solution
(a) Coenzyme is non-proteinaceous organic molecule required bound to the enzyme for functioning. Apoenzyme is the proteinaceous part of enzyme. Coenzyme+Apoenzyme=Holoenzyme

Q2.   Select the wrong statement
  •  Proteins are heteropolymers made of amino acids
  •  Ribozymes are nucleic acids with catalytic power
  •  Nucleic acids serve as genetic material
  •  Collagen is the most abundant protein in the whole of the biosphere and Rubisco is the most abundant proteins in animal world
Solution
(d) Collagen is the most abundant protein in animal world and Ribulose bisphosphate carboxylase-oxygenase (RUBISCO) is the most abundant protein in the whole of the biosphere.

Q3.   Which one is diaminodicarboxylic amino acid?
  •  Cystine
  •  Lysine
  •  Cysteine
  •  Aspartic acid
Solution
(a) Cystine is a dimeric amino acid formed by the oxidation of two cysteine residues, which covalently link to make a disulphide bond.
Q4.   Removal of amino group from an amino acid is known as
  •  Deamination
  •  Excretion
  •  Amination
  •  Egestion
Solution
(a) Removal of an amino group (-NH_2) frequently from an amino acid by transaminase enzyme is known as deamination. In mammals, deamination occurs chiefly in the liver.

Q5.   Pentoses and hexoses are common
  •  Monosaccharides
  •  Disaccharides
  •  Polysaccharides
  •  Oligosaccharides
Solution
  (a) Pentoses (e.g., ribose, deoxyribose) and hexoses (e.g., glucose, fructose, galactose) are common monosaccharides.

Q6.   Lactose is composed of following components
  •  Glucose and fructose
  •  Glucose and glucose
  •  Glucose, fructose and galactose
  •  Glucose and galactose
Solution
(d) Lactose or milk sugar is reducing sugar formed through β,1→4 condensation between galactose and glucose.

Q7.   Which of the following is not a coenzyme?
  •  NAD
  •  NADP
  •  FAD
  •  ATP
Solution
(d) Coenzymes are loosely attached non-protein low molecular weight thermostable organic groups, which readily separate from the apoenzyme, e.g., NAD (Nicotinamide Adenine Dinucleotide), NADP (Nicotinamide Adenine Dinucleotide Phosphate), FAD, FMN, Co-A, TPP (Thiamine Pyrophosphate), lipoic acid, etc. ATP (Adenosine Triphosphate) is the common energy currency of all cells.

Q8.   Name the term given to the left and right ends of a polysaccharide

  •  Left end-N-terminal end, Right end-C-terminal end
  •  Left end-reducing end, Right end-non-reducing end
  •  Left end- non-reducing end, Right end-reducing end
  •  Left end-C-terminal end, Right end-N-terminal end
Solution
(c) In a polysaccharide chain (say glycogen), the right end is called the reducing end and the left end is called the non-reducing end

Q9.   Hydrolysis of a glycosidic bond in a disaccharide is an example of
  •  Cleavage of biomolecules
  •  Hydrolysis of biomolecules
  •  Transformation of biomolecules
  •  Formation of biomolecules
Solution
(c) Transformation of biomolecules results due to the metabolic reactions occurring in body. Hydrolysis of glycosidic bond in a disaccharide results in the formation of simpler monosaccharides

Q10.   The enzyme which converts corn starch into fructose rich corn syrup is
  •  Amylase
  •  Glucoamylase
  •  Glucoisomerase
  •  All of these
Solution
(d) Amylases, glucoamylases and glucoisomerases are all enzymes that convert corn starch into high fructose syrup, which is used to flavour soft drinks and to sweeten biscuits and cakes.

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Biomolecules Quiz-06
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