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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1451. |
following structure is related to which AA?A. ``Glycine `H-overset(COOH)overset(|)underset(CH_(3))underset(|)C-NH_(2)`B. alanineC. serineD. tyrosine |
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Answer» Correct Answer - B |
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| 1452. |
Name a lipid that changes to vitamin D on activation by UV light. |
| Answer» Correct Answer - Ergosterol. | |
| 1453. |
What are lipids? |
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Answer» Lipids are the esters of fatty acids. |
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| 1454. |
one of the following is a heterocyclic amino acid .A. prolineB. HistidineC. HydroxyprolineD. All of these |
| Answer» Correct Answer - D | |
| 1455. |
Heterocyclic ring is found in which compound?A. N-basesB. ring structure of monosacchariedC. proteinD. 1 & 2 both |
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Answer» Correct Answer - D |
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| 1456. |
Give examples of carbon compounds with heterocyclic rings? |
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Answer» Adenine, guanine, cytosine, uracil, and thymine. |
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| 1457. |
What are micro-nutrients? |
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Answer» Minerals required by plants in trace quantities are micro-nutrients, e.g., manganese, cobalt, zinc copper, boron etc. |
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| 1458. |
What do NAD and FMN stand for ? |
| Answer» Nicotinamide adenine dinucleotide, flavin mononucleotide. | |
| 1459. |
What are the heterocyclic compounds in nucleic acids ? |
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Answer» The heterocyclic compounds in nucleic acids are of two types - purines and pyrimidines. Purines are adenine and guanine and pyrimidines are thymine, cytosine and uracil. |
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| 1460. |
What are the functions of waxes? |
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Answer» They are protective in function. Waxes form water insoluble coating on hair and skin on animals and plants, |
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| 1461. |
Expand NAD and DNA. |
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Answer» NAD = Nicotinamide adenine di-nucleotide. DNA = Deoxyribonucleic acid. |
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| 1462. |
Name two components of starch. |
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Answer» Amylose and amylopectin are the two components of starch. |
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| 1463. |
Reducing sugar isA. GlycogenB. SucroseC. LactoseD. All of the above |
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Answer» Correct Answer - C (C) Reducing sugar is lactose. |
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| 1464. |
Name a structural polysaccharide which is found in fungi. |
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Answer» Chitin (fungus cellulose). |
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| 1465. |
Which is a structural polysaccharide ?A. GlycogenB. ChitinC. KeratinD. Pectin |
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Answer» Correct Answer - B (B) Chitin is structural polysacchrides |
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| 1466. |
Which one of the following ratios is variable but constant for a species?A. `([A +T])/([G+C])`B. `([A + G])/([T + C])`C. `([A + U])/([G+ C])`D. None of these |
| Answer» Correct Answer - A | |
| 1467. |
What will be the sequence of bases on on m-RNA molecule synthesised on the following strand of DNA ? -TATCTACCTGGA- |
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Answer» We know cytosine (C ) always pairs with adenine (A) in RNA but adenine (A) in DNA must pair up with uracil (U) in RNA. Base sequence in DNA strand : -TATCTACCTGGA- Base sequence in m-RNA strand : -AUAGAUGGACCU- |
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| 1468. |
Table sugar isA. sucroseB. glucoseC. fructoseD. lactose |
| Answer» Correct Answer - A | |
| 1469. |
DNA nucleotides are attached byA. hydrogen bondB. covalent bondC. van der Waals bondD. electrovalent bond |
| Answer» Correct Answer - A | |
| 1470. |
Expand DNA. |
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Answer» Deoxy ribo nucleic acid |
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| 1471. |
What is the genetic code? |
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Answer» The sequence of amino acids in the protein synthesised is predetermined from the nucleotide base sequence of mRNA which in turn is correspondingly derived from the base sequence of DNA. The DNA sequence that codes for a specific protein or a polypeptide are called a gene. Thus every protein in a cell has a corresponding gene. The relation between the nucleotide triplets and the amino acid is called the genetic code. |
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| 1472. |
What do you understand by denaturation of protein? Explain. |
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Answer» Denaturation of Proteins: A protein present in the biological system with a unique three-dimensional structure and biological activity is known as the native protein. When a native protein is subjected to either some physical change or chemical change by taking part in certain chemical reactions which bring about a change in pH, this leads to denaturation of the native protein. The denaturation is due to the breaking of the H-bonds as a result of which the globules unfold and helix get uncoiled. The protein loses its biological activity on account of denaturation. Chemically denaturation does not change the primary structure of the protein and only brings about change in secondary and tertiary structures. |
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| 1473. |
Which of the following amino acid has hydroxyl methyl gruop as its groupA. serineB. prolineC. alanineD. arginine |
| Answer» Correct Answer - A | |
| 1474. |
Which is wrong about nucleic acids ?A. DNA is single stranded in some virusesB. RNA is double stranded occasionallyC. Length of one helix is 45 `Å` in B-DNAD. One turn of Z-DNA has 12 bases |
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Answer» Correct Answer - C Length of one helix or the pitch per tum of helix is 34 `Å` in B-DNA, 25 `Å` in A-DNA and 46 A in Z-model of DNA. In Z-DNA sugar moieties are seen in opposite direction. So the 3-5 diester bond forms zig-zag structure in Z-DNA. |
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| 1475. |
AN enzyme brings aboutA. decrease in reaction timeB. increase in reaction timeC. increase in activation energyD. reduction in activation energy |
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Answer» Correct Answer - D Enzymes act by reducing the arnount of activation energy. The binding energy is the source of energy used by enzyme to lower the activation energy of reaction. Activation energy is the minimum energy required from outside to overcome the energy barrier of reactants. Enzymes lower energy of activation by two ways-bringing reactants molecules together, and developing strain in bonds of reactants. |
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| 1476. |
Adenine isA. purineB. pyrimidineC. nucleosideD. nucleotide |
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Answer» Correct Answer - A Nitrogen bases are of two types-purines and Pyrimidines. Purities are 9 membered double ring nitrogen bases which possess nitrogen at 1, 3, 7 and 9 positions, e.g. adenine (A), guanine (G). Pyrimidines are 6-membered nitrogen bases that contain nitrogen at 1 and 3 positions, e.g. cytosine (C), thymine (T), uracil (U). |
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| 1477. |
Amino acids are produced fromA. proteinsB. fatty acidsC. essential oilsD. `alpha`-keto acids |
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Answer» Correct Answer - D Amino acids are smallest structural units of proteins. Plants and some microorganisms can synthesise these amino acids from inorganic nitrogen/`alpha`-keto acids by reductive amination and transamination. Amino acids besides bearing a carboxyl group, possess an amino group attached to `alpha`-carbon, hence, called as `alpha`-amino acids. |
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| 1478. |
Glycogen is a polymer ofA. galactoseB. glucoseC. fructoseD. sucrose |
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Answer» Correct Answer - B A glycogen molecule is a long highly branched chain of about 30000 to 100000 `alpha`-D glucose units joined by glycosidic boµds. It is storage form of glucose, popularly called animal starch. It provides energy to animals, fungi and bacteria. |
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| 1479. |
Living cell contains 60-75% water. Water present in human body isA. 60-65%B. 50-55%C. 75-80%D. 65-70% |
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Answer» Correct Answer - D In humans, about two-third of body is formed of water. About 65-70% .of human body is water, of these about 55% (20-22 L) is confined to cells as intracellular water. |
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| 1480. |
What is meant by tertiary structure of proteins? |
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Answer» The overall shape of a protein molecule; and the spatial relationship of the secondary structures to one another; is called tertiary structure of protein. In other words, the various folds which give three dimensional appearances to protein form its tertiary structure. |
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| 1481. |
Which one of the following is widely distributed in a cellA. DNAB. RNAC. ChloroplastsD. Spherosomes |
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Answer» Correct Answer - B Ribonucleic Acid (RNA) is a single chain polyribonucleotide which functions as carner of coded genetic information from DNA to cycoplasm and takes part in protein and enzyme synthesis. RNA is more common and abundant than DNA. There are six types of RNAs-ribosomal (most abundant), transfer RNA (15% to total RNA), messenger RNA (2-5%), small sized nuclear RNA, small cytoplasmic RNA, and genetic RNA (in viruses called riboviruses). |
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| 1482. |
Which one of the following is widely distributed in a cellA. DNAB. RNAC. ChloroplastD. Chromoplast |
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Answer» Correct Answer - B (b) RNA is present both inside and outside the nucleus. |
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| 1483. |
Enzymes which catalyse reaction involving change in the structure of a molecule areA. LigasesB. IsomerasesC. HydrolasesD. Transferases. |
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Answer» Correct Answer - B (B) Enzymes which catalyse reactions involving changes in structure of a molecules are isomereases. |
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| 1484. |
Who first used the term 'enzyme'A. J.B. SumnerB. KuhneC. ThompsonD. Garnier |
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Answer» Correct Answer - B (b) The term enzyme was used by Willy Kuhne while working on fermentation. |
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| 1485. |
Optimum temperature is the temperature at which and enzymeA. work at its bestB. is not destroyedC. action is reversedD. is inactivated |
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Answer» Correct Answer - A (A) Optimum temperature is the temperature at which an enzyme works at its best. |
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| 1486. |
Enzymes work at optimum temperature. Over a range `0-40^(@)C`, what would happen to the rate of enzyme controlled reactions for every `10^(@)C` rise in temperature ?A. The rate doubles itselfB. Decreases by halfC. No effectD. First increases than decreases |
| Answer» Correct Answer - A | |
| 1487. |
Study the following graph of concept of activation energy given below. Select the correct option for stages labelled A to D. A. `{:(A,B,C,D),("Transition State","Potential energy","Activation energy without enzyme","Activation energy without enzyme"):}`B. `{:(A,B,C,D),("Kinetic energy","Potential energy","Activation energy without enzyme","Activation energy with enzyme"):}`C. `{:(A,B,C,D),("Potential energy","Transition state","Activation energy without enzyme","Activation energy with enzyme"):}`D. `{:(A,B,C,D),("Potential energy","Transition state","Activation energy without enzyme","Activation energy without enzyme"):}` |
| Answer» Correct Answer - C | |
| 1488. |
Which of the following factor/s can influence enzyme activity ?A. High temperatureB. pHC. Substrate concentrationD. All of these |
| Answer» Correct Answer - D | |
| 1489. |
What would happen to `V_("max")`, in presence of a competitive inhibitor ?A. DecreasesB. IncreasesC. Remains the sameD. First increases then decreases |
| Answer» Correct Answer - C | |
| 1490. |
What is a peptide bond? |
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Answer» It is a bond formed between two amino acids in a protein molecule. (CONH). |
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| 1491. |
Glycogen is stored inA. liver and musclesB. liver onlyC. muscles onlyD. pancreas |
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Answer» Correct Answer - A |
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| 1492. |
Which one is a disaccharide ?A. galactoseB. fructoseC. maltoseD. dextrin |
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Answer» Correct Answer - C |
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| 1493. |
All the following statement about the sturcture of glycogen are true except.A. branched chains occur after every ten residuesB. it is a copolymer of glucose and mannoseC. it contains `alpha` -, 4-glycosidic linkagesD. it contains `alpha`-1 6- glycosidic linkages |
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Answer» Correct Answer - B |
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| 1494. |
In unit area which stored polysachharide porvides maximum energy?A. starchB. lipidsC. glycogenD. cellulose |
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Answer» Correct Answer - C |
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| 1495. |
In which form food is stored in animal body ?A. glucoseB. glycogenC. celluloseD. atp |
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Answer» Correct Answer - B |
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| 1496. |
Glycogern isA. polymer of amino acidsB. polymer of fatty aidsC. unsaturated fatsD. polymer of glucose |
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Answer» Correct Answer - D |
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| 1497. |
Fats in the body ar formed whenA. glycogen is formed from glucoseB. sugar level becomes stable in bloodC. extra glycogen stroage in liver and muscles is stoppedD. all of them |
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Answer» Correct Answer - C |
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| 1498. |
In which form the extra sugars are stored in the animals body?A. glucose monosaccharideB. sucrose disaccharideC. glycogen polysaccharideD. fatty accid and glycerol |
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Answer» Correct Answer - C |
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| 1499. |
Which of the following will be different in different animalsA. fatsB. carbohydratesC. proteinsD. vitamins |
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Answer» Correct Answer - C |
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| 1500. |
Cholestrerol is synthesized inA. pancreasB. brunners glandC. spleenD. liver |
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Answer» Correct Answer - D |
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