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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.
| 751. |
The relationship between the nucleotide triplets and the amino acid is called.A. TranslationB. TranscriptionC. ReplicationD. A genetic code |
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Answer» Correct Answer - D The relationship between the nucleotide triplets and the amino acids is called a genetic code. |
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| 752. |
Which of the following is not a primidine base ?A. UracilB. GuanineC. CytosineD. Thymine |
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Answer» Correct Answer - B Guanine is not a pyrimidine base. |
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| 753. |
A sequence of how many nucleotides in messenger RNA makes a condon for an amino acidA. threeB. fourC. oneD. two |
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Answer» Correct Answer - A See translation of proteins. |
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| 754. |
Periodic acid splits glucose and fructose into formic acid and formaldehyde. Ratio of fomic acid and formaldehyde from glucose and fructose is:A. 5/1 and 4/2B. 5/1 and 3/2C. 4/2 and 4/2D. 3/2 and 4/2 |
| Answer» Correct Answer - B | |
| 755. |
Periodic acid splits glucose and fructose into formic acid and formaldehyde. Ratio of fomic acid and formaldehyde from glucose and fructose is:A. 5/1 and 4/2B. 5/1 and 5/1C. 4/2 and 4/2D. 5/1 and 3/2 |
| Answer» Correct Answer - d | |
| 756. |
Nucleotides, the polymers of nucleic acid are joined together by __________ bond.(A) Peptide (B) Ester (C) Phosphodiester (D) Glycosidic |
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Answer» The correct answer is (C) Phosphodiester |
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| 757. |
Which of the following is considered to be an anticancer species?A. B. C. D. |
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Answer» Correct Answer - C `cis` isomer of `Pt (NH_(3))_(2) Cl_(2)` is used as an anticancer drug. |
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| 758. |
A narrow spectrum antibiotic is active againstA. gram positive or gram negative bacteriaB. gram negative bacteria onlyC. single organism or one diseaseD. both gram positive and gram negative bacteria |
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Answer» Correct Answer - A Gram positive or gram negative bacteria. |
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| 759. |
Antiseptics and disinfectants either kill of prevent growth of microorganism. Identify which of the following statements is not true :A. Chlorine and Iodine are used as strong disinfectantsB. Dilute solutions of Boric acid and Hydrogen, peroxide are strong antisepticsC. Disinfectants harm the living tissuesD. A `0.2%` solution of phenol is an antiseptic while `1%` solution acts as a disinfectant. |
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Answer» Correct Answer - B Dilute solutions of boric acid and `H_(2) O_(2)` are wea antiseptic. |
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| 760. |
Antiseptics and disinfectants either kill of prevent growth of microorganism. Identify which of the following statements is not true :A. A 0.2 % solution of phenol is an antiseptic which 1% solution acts as a disinfectantB. chlorine and iodine are used as strong disinfectantsC. Dilute solutions of boric acid and hydrogen, peroxides are strong antisepticsD. Disinfectants harm the living tissues |
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Answer» Correct Answer - C Antispetics and disinfectants both either kill or prevent the growth of micoorganisms . The main point of difference between these two is that the former (antispetics) are used for living beings whereas disinfectants are not safe for living tissues. these are actually used for inanimate objects like floors, tiles etc. A substances like phenol in its lower concentration (0.2%) behave as antispetic, whereas in higehr concentration (1%) as disinfectants whereas dilute solution of boric acid and hydrogen peroxide are mild antiseptics. |
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| 761. |
Antiseptics and disinfectants either kill or prevent growth of microorganism. Identify which of the following statements is not true `:`A. Chlorine and iodine are used as strong disinfectantsB. Disinfectants harm the living tissuesC. Dilute solutions of boric acid and hydrogen peroxide are strong antisepticsD. A `0.2%` solution of phenol is an antiseptic while `1%` solution acts as a disinfectant |
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Answer» Correct Answer - C Dilute solutinos of boric acid and hydrogen peroxide are weak antiseptics. |
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| 762. |
Consider the compound and arrange X,Y, Z in order of increasing acid strengths .A. `X gt Z gt Y`B. `Z lt X lt Y`C. `X gt Y gt Z`D. `Z gt X gt Y` |
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Answer» Correct Answer - A Carboxylic acids are stronger acids than `-NH_(3)^(+)` , therefore X is the strongest acid. Since -COOH has -I effect which decreases with distance , therefore, effect is more pronounced on Z than on Y. As a result Z is more acidic than Y. Therefore, overall order of increasing acid strength is `X gt Z gt Y`. |
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| 763. |
Which of the following is L-fructose?A. B. C. D. |
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Answer» Correct Answer - D |
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| 764. |
Cyclic structure of D-glucose resembles withA. furanB. pyranC. THFD. oxiran |
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Answer» Correct Answer - B |
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| 765. |
Glucose form hemiacetal between CHO group and -OH group onA. C-2B. C-3C. C-4D. C-5 |
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Answer» Correct Answer - D |
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| 766. |
Which of the following is not present in RNA?A. UracilB. RiboseC. ThyamineD. Phosphate |
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Answer» Correct Answer - C Thymine is not present in RNA |
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| 767. |
Which out of the following in a cell would have the smallest molecule?A. DNAB. m-RNAC. r-DNAD. t-RNA |
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Answer» Correct Answer - D t RNA is the smaller nucleic acid. |
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| 768. |
Proteins are biomolecules composed of `alpha-` amino acids. An `alpha-`amino acid has a general formula `R-underset(underset(NH_(2))(|))(C)-COOH`. The amino acids polymerise and form an amide linkage (peptide linkage) between two monomeric amino acid units. The polymerisation takes place as follows `H_(2)N-overset(overset(R_(1))(|))(CH)-underset(underset(O)(||))(C)-OH+H- underset(darr underset((-2H_(2)O))("Polymerisation"))(HN-overset(overset(R_(2))(|))(CH)-underset(underset(O)(||))(C))-OH+H-NH- overset(overset(R_(3))(|))(CH)-underset(underset(O)(||))(C)-OH` Two or more similar amino acids can also polymerise, for example a dimer will be like. `H_(2)N- overset(overset(R)(||))(CH)-underset(underset(O)(||))(C)-NH-overset(overset(R)(||))(CH)-underset(underset(O)(||))(C)-OH`. In the above trimer, if `R_(1)=H , R_(2)=CH_(3)` & `R_(3)=Ph` then total number of optically active stereoisomers will be :A. 8B. 6C. 4D. 2 |
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Answer» Correct Answer - C The trimer will have structure `H_(2)N-CH_(2)-underset(underset(O)(||))(C)-NH-overset(overset(CH_(3))(._(**)|))(CH)-underset(underset(O)(||))(C)-NH-overset(overset(Ph)(._(**|)))(CH)-underset(underset(O)(||))(C)-OH`. It has two dissimilar asymmetric atoms, so its total number of stereoisomers will be `2^(2) =4`. |
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| 769. |
The two strands in DNA are not identical but are complementary. Explain. |
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Answer» In the helical structure of DNA, the two strands are held together by hydrogen bonds between specific pairs of bases. Cytosine forms hydrogen bond with guanine, while adenine forms hydrogen bond with thymine. As a result, the two strands are complementary to each other. |
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| 770. |
How many types of polysaccharides you know? |
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Answer» There are two types of polysaccharides: 1. Homopolysaccharides: It contains same type of monosaccharides. E.g. Starch, glycogen, cellulose. 2. Heteropolysaccharides: It contains two or more different monosaccharides. E.g. Hyaluronic acid, heparin, hemicellulose. |
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| 771. |
What is reducing sugar? |
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Answer» 1. A sugar that serves as a reducing agent due to presence of free aldehyde or ketone group is called a reducing sugar. 2. These sugars reduce the Benedict’s reagent (Cu2 + to Cu+) since they are capable of transferring hydrogens (electrons) to other compounds, a process called reduction. 3. All monosaccharides are reducing sugars. |
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| 772. |
Why are nucleic acids? Mention their two important functions. |
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Answer» Nucleic acids are biomolecules which are found in the nuclei in the form of nucleoproteins or chromosomes (protein containing nucleic acids as the prosthetic group). Nucleic acids are of two types: deoxyribonucleic acid `(DNA)` and ribonucleic acid `(RNA)`. The two main functions of nucleic acid are: (i). `DNA` is responsible for the transmission of hereditary effects from one generation to another.this is due to the unique property of replication. During cell division two identical `DNA` strands are transferred to the doughter cells. (ii). `DNA` and `RNA` are reponsible for the growth and maintenance of our body. Actually the proteins are synthesised by various `RNA` molecules `(r-RNA, m-RNA`, and `t-RNA)` in the cell but the message for the synthesis of a particular protein is present in the `DNA`. |
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| 773. |
Which of the following is not a constitutent of RNA? (a) Ribose (b) Phosphate (c) Adenine (d) Pyridine |
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Answer» (d) Pyridine |
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| 774. |
Enlist the significance of carbohydrates. |
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Answer» Significances of carbohydrates are as follows: 1. Carbohydrates provide energy for metabolism. 2. Glucose is the main substrate for ATP synthesis. 3. Lactose, a disaccharide present in the milk provides energy to babies. 4. Polysaccharide serves as a structural component of cell membrane, cell wall and reserved food as starch and glycogen. |
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| 775. |
How are proteins classified with respect to peptide bond ? |
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Answer» With respect to peptide bond proteins clessified into two types. 1) Fibrous proteins 2) Globular proteins. |
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| 776. |
Differentiate between a nucleoside and a nucleotide. |
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Answer» Nucleoside Consists of sugar and nitrogenous base. The linkage present is called glyosidic. Eg. is Adenosine, Deoxyadenosine. Nucleotide Consists of sugar, nitrogenous base & phosphoric acid. The linkage present is termed phosphorites linkage. Eg. is Adenylic acid, deoxy adenylic acid. |
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| 777. |
Which one is fouñd in ATP ribonucleotide?(a) Guanine (b) Uracil (c) Adenine (d) Inulin |
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Answer» Adenine is fouñd in ATP ribonucleotide |
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| 778. |
Give the biological significance of carbohydrates. |
Answer»
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| 779. |
What is the difference between a nucleoside and a nucleotide? |
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Answer» Nucleoside is formed by the condensation of a purine or pyrimidine base with pentose sugar at position 1. When nucleoside is linked to phosphoric acid at 5 position of sugar moiety, we get a nucleotide. Hence a nucleotide has three units – Phosphate group, pentose sugar and a base, whereas nucleoside has two units – pentose sugar and a base. |
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| 780. |
Give any two biological significances of amino acids. |
Answer»
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| 781. |
In nucleic acid, the correct sequence is …….. (a) base – phosphate sugar (b) phosphate – base – sugar (c) sugar – base – phosphate (d) base – sugar – phosphate |
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Answer» (d) base – sugar – phosphate |
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| 782. |
Which substance is not present in nucleic acid?(a) Cytosine (b) Adenine (c) Thymine (d) Guanidine |
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Answer» (d) Guanidine |
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| 783. |
Name the monomer of nucleic acids and mention Its components. |
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Answer» Nucleotide comprising sugar, nitrogenous base and phosphoric acid. |
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| 784. |
What are nucleic acids? Mention their two important functions. |
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Answer» Nucleic acids are polymers of nucleotides containing a pentose sugar, heterocyclic base and a phosphate group. They help in synthesis of proteins. They are also responsible for the transfer of genetic characters from one generation to the next generation. |
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| 785. |
Why are vitamin A and vitamin C essential to us? Give their important sources. |
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Answer» The deficiency of vitamin A leads to xerophthalmia (hardening of the cornea of the eye) and night blindness. The deficiency of vitamin C leads to scurvy (blending gums). The sources of vitamin A are fish liver oil, carrots, butter and milk. The sources of vitamin C are citrus fruits, amla and green leafy vegetables. |
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| 786. |
What are the components of nucleic acid ? |
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Answer» `to` Nucleic acids are long chain polymers of nucleotides i.e poly nucleotides. `to` Nucleic acids are constituted by pentose sugar, phosphoric acid, and nitrogenous hetero cyclic base (purine (or) pyrimidine). |
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| 787. |
Why are vitamin `A` and vitamin `C` essential for us? Give their important sources. |
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Answer» Vitamin A is essential for us because its deficiency cause xerophthalmia (hardening of cornea of eye) and night blindness. Sources : Fish liver oil, carrots, butter milk, etc. Vitamin C is essential for us because its deficiency causes scurvy (bleeding of gums) and pyorrhea (loosening and bleeding of teeth). Sources: Citrous fruits, amla, green leafy vegetables etc. |
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| 788. |
Write the names of three types of RNA. |
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Answer» Three types of RNA are i) Messenger RNA (mRNA) ii) Ribosomal RNA (rRNA) iii) Transfer RNA (tRNA) |
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| 789. |
Which one of the given proteins transports oxygen in the blood stream?A. haemoglobinB. insulinC. collagenD. albumin |
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Answer» Correct Answer - A |
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| 790. |
Write the biological functions of nucleic acids. |
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Answer» Biological functions of nucleic acids : `to` DNA is the chemical basis of heredity. DNA is the reserve of genetic information. `to` DNA is capable of self duplication of during cell division and indentical DNA strands are transferred to daughter cells. `to` RNA molecules are used in the protein synthesis in the cell `to` The message for the synthesis of a portion is present in DNA. |
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| 791. |
Proteins are hydrolysed by enzymes into ………(a) dicarboxylic acid (b) hydroxy acids(c) amino acids (d) aromatic acids |
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Answer» (c) amino acids |
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| 792. |
Name the vitamin responsible for the coagulation of blood. |
| Answer» The vitamin responsible for the coagulation of blood is vitamin K. | |
| 793. |
Which one of the protein transports oxygen in the blood stream? (a) Myoglobin (b) Insulin (c) Albumin (d) Haemoglobin |
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Answer» (d) Haemoglobin |
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| 794. |
When glucose is heated with nitirc acid, the product is:A. gluconic acidB. glucaric acidC. glycoic acidD. oxalic acid |
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Answer» Correct Answer - B `CHO(CHOH)_(4)CH_(2)OHunderset([O])overset(HNO_(3))COOH(CHOH)_(4)CO OH` |
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| 795. |
Lactose is made of:A. `beta-D` galactose and `beta-D-`glucoseB. `alpha-D` galactose and `beta-D-`glucoseC. `beta-D` galactose and `alpha-D-`glucoseD. `alpha-D` galactose and `alpha-D-`glucose |
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Answer» Correct Answer - B Lactose is obtained by the condensation of one molecule of `beta-D`-galactopyranose `(C_(1) - beta)` unit and one molecule of `beta-D` glucose `(C_(4) - beta)` unit. |
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| 796. |
Glucose reacts with bromine water to products `:`A. acetic acidB. saccharic acidC. gluconic acidD. n-hexane |
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Answer» Correct Answer - C |
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| 797. |
Glucose on oxidation with bromine water give ……… |
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Answer» Glucose on oxidation with bromine water give Gluconic acid |
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| 798. |
Fructose is :(a) aldopentose (b) aldohexose (c) ketopentose (d) ketohexose |
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Answer» Option : (d) ketohexose |
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| 799. |
The polysaccharide used in the manufacture of paper isA. celluloseB. starchC. glucoseD. sucrose |
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Answer» Correct Answer - A Cellulose is commonly used in manufacture of paper. |
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| 800. |
The secondary structure of a protein refers to ………(a) fixed configuration of the polypeptide backbone(b) hydrophobic interaction(c) sequence of a-amino acids(d) α – helical backbone |
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Answer» (d) α – helical backbone |
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