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851.

choose is aA. Globular proteinB. Conjugated proteinC. Denatured prteinD. All of these

Answer» Correct Answer - C
852.

the type of prolamines and glutelins found in wheat areA. Zein and gladinB. Glutelin and hordeinC. Gliadin and gluteninD. Hordein and zein

Answer» Correct Answer - C
853.

which of the protein is involved in the transport of or-ganic compouinds through phloem?A. ProtamineB. p-ProteinC. MyosinD. Glutelin

Answer» Correct Answer - B
854.

Vitamin nicotinamide as well as the plant hormone in dole -3-acetoic acid are formed fromA. TryptophanB. AlanineC. Glutamic acidD. Serine

Answer» Correct Answer - A
855.

which of the following amino acids is involved in the formation of heme ?A. TryptophanB. TyrosineC. GlycineD. Histidine

Answer» Correct Answer - C
856.

In DNA, cytosine pairs withA. GuanineB. ThymineC. AdenineD. Uracil

Answer» Correct Answer - A
857.

t-RNA constitutes aboutA. 70-80% of the total RNAB. 15% of the total RNAC. 5% of the total RNAD. 1-3% of the total RNA

Answer» Correct Answer - B
858.

skin pigment melanium is formed fromA. TyrsineB. AdrenalineC. Indole-3-acetic acidD. Tryptophan

Answer» Correct Answer - A
859.

RNA is a polymer ofA. RibonucleotidesB. DeoxyribonucleotidesC. DeoxyribonucleosidesD. Ribonucleosides

Answer» Correct Answer - A
860.

Lysine is an essential amino acid becauseA. It is very rareB. It has a high nutritive valueC. It is an important cinstituent of all proteinsD. It is not formed in the body and has to be provided through diet

Answer» Correct Answer - D
861.

which one of the following is alcholic amino acid pair ?A. tyrosine and serineB. Theronine and serineC. phenylalanine and tyrosineD. Tryptophan and phenylalanine

Answer» Correct Answer - B
862.

Which one of the following is alcoholic amino acid par?A. Tyrosine and serineB. Threonine and serineC. Phenylalanine and tyrosineD. Tryptophan and phenylalanine

Answer» Correct Answer - B
863.

which of the following are basic amino acids?A. Glycine and AlannieB. Lysine and ArginineC. Glutamic acid and Asparic acidD. Histidine and Proline

Answer» Correct Answer - B
864.

The ratio of the enzyme to substrate molecule can be as high asA. `1:1000`B. `1:1,00,000`C. `1:10,00,000`D. `1,50,000`

Answer» Correct Answer - C
865.

Assertion : The acid soluble pool represents roughly the cytoplasmic composition. Reason : The macromolecules from cytoplasm and organelles become the acid insoluble fraction.A. If both assertion and reason are true and the reason is the correct explanation of the assertionB. If both assertion and reason are true and the reason is not the correct explanation of the assertionC. If assertion is true but reason is falseD. If both assertion and reason are false

Answer» Correct Answer - B
(B) The acid soluble pool represents roughly the cytoplasmic composition.
The macromolecules from cytoplams and organelles become the acid insoluble fraction.
866.

Assertion. Nucleic acids are strong acids. Reason. Nitrogen gives the bases of nucleic acids their basic nature.A. If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion.C. If Assertion is true but the Reason is false.D. If both Assertion and Reason are false.

Answer» Correct Answer - B
867.

Name two classes of nitrogen containing bases present in nucleic acids.

Answer» These are purines and pyrimidines.
868.

In pyrimidines, N is at _____position in its noe ring.A. 1,3B. 7,9C. 1D. 1&9

Answer» Correct Answer - A
869.

Exposure of sunlight help to synthesise which vitamin in our body?A. AB. BC. CD. D

Answer» Correct Answer - D
Exposure of sunlight help to synthesise vitamin D in body
870.

which mineral element is found in abudance in eukaryotic cellA. CaB. PC. MgD. S

Answer» Correct Answer - A
871.

which of the following type of water most abundantly found in protoplasmA. free formB. bound formC. crystal formD. ice form

Answer» Correct Answer - A
872.

a plant reuqires magnesium for :A. holding cells togetherB. protein synthesisC. chlorophyll synthesisD. fat synthesis

Answer» Correct Answer - C
873.

which element is common in haemohlobin and myoglobinA. FeB. CuC. MnD. Mg

Answer» Correct Answer - A
874.

which monosaccharide does not show optical isomerism:A. dihydroxy acetoneB. glyceraldehydeC. erythroseD. ribose

Answer» Correct Answer - A
875.

common in feather and silk isA. carbohydrateB. fatsC. proteinD. nucleic acid

Answer» Correct Answer - C
876.

Explain the concept of metabolism.

Answer»

1. Metabolism is the sum of the chemical reactions that take place within each cell of a living organism and provide energy for vital processes and for synthesizing new organic material. 

2. It involves continuous process of breakdown and synthesis of biomolecules through chemical reactions. 

3. Each of the metabolic reaction results in a transformation of biomolecules. 

4. Most of these metabolic reactions do not occur in isolation but are always linked with some other reactions. 

5. In cells, metabolism involves two following types of pathways: 

a. Catabolic pathways 

This involves formation of simpler structure from a complex biomolecule. For e.g. when we eat wheat, bread or chapati, our gastrointestinal tract digests (hydrolyses) the starch to glucose units with help of enzymes and releases energy in form of ATP (Adenosine triphosphate). 

b. Anabolic pathway 

It is also called as biosynthetic pathway that involves formation of a more complex biomolecules from a simpler structure Fone.g., synthesis of glycogen from glucose and protein from amino acids. These pathways consume energy.

877.

Describe the concept of metabolism.

Answer»

1. Metabolism is the sum of the chemical reactions that take place within each cell of a living organism and provide energy for vital processes and for synthesizing new organic material. 

2. It involves continuous process of breakdown and synthesis of biomolecules through chemical reactions. 

3. Each of the metabolic reaction results in a transformation of biomolecules. 

4. Most of these metabolic reactions do not occur in isolation but are always linked with some other reactions. 

5. In cells, metabolism involves two following types of pathways: 

a. Catabolic pathways 

This involves formation of simpler structure from a complex biomolecule. For e.g. when we eat wheat, bread or chapati, our gastrointestinal tract digests (hydrolyses) the starch to glucose units with help of enzymes and releases energy in form of ATP (Adenosine triphosphate). 

b. Anabolic pathway 

It is also called as biosynthetic pathway that involves formation of a more complex biomolecules from a simpler structure Fone.g., synthesis of glycogen from glucose and protein from amino acids. These pathways consume energy.

878.

Monosaccharide isA. pentose sugarB. hexose sugarC. only glucoseD. all the above

Answer» Correct Answer - D
879.

Define metabolism.

Answer»

Metabolism is all the chemical reactions that constantly occur in living organisms.

880.

Sugar which ocurs in haemolymph of insectsA. chondriotinB. heparinC. trehaloseD. maltose

Answer» Correct Answer - C
881.

Sugar which is found in haemolymphj of insects is calledA. maltoseB. lactoseC. trehaloseD. galactose

Answer» Correct Answer - C
882.

What is dynamic state of the body constituents?

Answer»

The flow of metabolites at a definite rate; and direction in the living body is called dynamic state of the body constituents.

883.

sugar which is found in hemolymph of insects is calledA. MaltoseB. LactoseC. TrehaloseD. Galeactose

Answer» Correct Answer - C
884.

Chemically ,enzymes areA. fatsB. CarbohydratesC. hydrocarbonsD. Proteins

Answer» Correct Answer - D
885.

which substance is most abundant in cell ?A. carbpohydratesB. proteinC. waterD. fats

Answer» Correct Answer - C
886.

Enzymes are the polymers of Or Which of the following is polymerized to form proteins Or An enzyme can be synthesised by chemically bonding together molecules ofA. Hexose carbonB. Fatty acidsC. Amino acidsD. Inorganic phosphate

Answer» Correct Answer - C
(c) Because enzymes are made up of proteins which are basically polymers of amino acids.
887.

What are enzymes chemically?

Answer»

Enzymes are chemically proteins.

888.

number of H-bonds between guanine and cytosine are-A. oneB. twoC. threeD. Four

Answer» Correct Answer - C
889.

Which of the following contains nitrogen?A. fatsB. proteinC. carbohydratesD. none

Answer» Correct Answer - B
Proteins contain nitrogen . Nitrogen is not present in fats of carbohydrates.
890.

`alpha`-D(+)-glucose and `beta`-D(+) glucose areA. antimersB. epimersC. anomersD. tautomers

Answer» Correct Answer - C
891.

Sucrose is made up ofA. D-glucose+L-fructoseB. D-glucose+D-fructoseC. L-glucose+L-fructoseD. L-glucose+D-fructose

Answer» Correct Answer - B
892.

Protein on hydrolysis gives .. .... `alpha-ammino acids ?A. 15B. 20C. 30D. 40

Answer» Correct Answer - C
893.

The enzyme pepsin hydrolysesA. Proteins to amino acidsB. fats to fatty acidsC. glucose to ethyl alcoholD. polysaccharides to monosaccharides

Answer» Correct Answer - A
The enzyme pepsin hydrolysis proteins into amino acids.
894.

Which has maximum protein content?A. Ground nutB. cow milkC. EggD. Wheat

Answer» Correct Answer - A
Groundnut contains more proteins than cow milk, egg or wheat.
895.

On hydrolysis of cane sugar, we can obtainA. Fructose + GlucoseB. Fructose + FructoseC. Glucose + GlucoseD. Glucose + Lactose

Answer» Correct Answer - A
896.

The following carbohydrate is: A. `alpha`=ketohexoseB. an aldohexoseC. an `alpha`-furanoseD. an `alpha`-pyranose

Answer» Correct Answer - B
I represents `beta`-D -glucopyranose-an aldohexone
897.

Which of the following would face cytosine of DNA stand during transcription of m-RNA?A. GuanineB. uracilC. adenineD. thymine

Answer» Correct Answer - B
Cytosine of DNA strand will face uracil of mRNA during transciption.
898.

CH2OH-CO-(CHOH)4 -CH2OH is an example ofa. Aldohexose b. Aldoheptose c. Ketotetrose d. Ketoheptose

Answer»

Correct answer is

(d) Ketoheptose

899.

Name the components of starch.

Answer»

There are two components of starch, i.e., amylose and amylopectin.

900.

Which of the two components of starch are water soluble ?

Answer»

Amylose starch are water soluble.