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Inhibitor binds to the active site of the enzyme. Hence blocking the reaction. This is an example of
Q. 15 of Quiz-1446 (Que-ID : 3941)
Inhibitor binds to the active site of the enzyme. Hence blocking the reaction. This is an example of
- allosteric inhibition
- feedback inhibition
- uncompetitive inhibition
- competitive inhibition
Ans → (d)competitive inhibition
Explanation → When substrate binds to the active site of the enzyme, it completes the reaction.When inhibitor binds to the active site of the enzyme, it blocks the reaction
This question is taken from this post → Biomolecules class 11 biology test | MCQs for NEET - attemp/practice
More MCQs in - Biomolecules class 11 biology test | MCQs for NEET
Q. 1 of Quiz-1446 (Que-ID : 3927)
Feedback inhibition of enzymes is affected by which of the following
- enzyme
- substrate
- end products
- intermediate end products
Q. 2 of Quiz-1446 (Que-ID : 3928)
An example of competitive inhibition of an enzyme is the inhibition of
- succinic dehydrogenase by malonic acid
- cytochrome oxidase by cyanide
- hexokinase by glucose-6-phosphate
- carbonic anhydrase by carbon dioxide
Q. 3 of Quiz-1446 (Que-ID : 3929)
Insulin is made up of _______ and _______.
- glucose and fructose
- glucose and fructose
- fructose and mannose
- mannose and glucose
Q. 4 of Quiz-1446 (Que-ID : 3930)
Enzymes increase the rate of reaction by
- lowering activation energy
- increasing activation energy
- increasing temperature and pH
- decreasing temperature and pH
Q. 5 of Quiz-1446 (Que-ID : 3931)
Which of the following statements regarding enzyme inhibition is correct?
- Competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibitor protein
- Non-competitive inhibitors often bind to the enzyme irreversibly
- Competitive inhibition is seen when the substrate and the inhibitor compete for the active site on the enzyme
- Non-competitive inhibition of an enzyme can be overcome by adding large amount of substrate
Q. 6 of Quiz-1446 (Que-ID : 3932)
Which of the following is not a pyrimidine?
- Uracil
- Cytosine
- Guanine
- Thymine
Q. 7 of Quiz-1446 (Que-ID : 3933)
Hydrolysis of starch occurs with the help of
- Peptidase
- Amylase
- Sucrose
- Lipase
Q. 8 of Quiz-1446 (Que-ID : 3934)
Assertion: Arachidic acid is an unsaturated fatty acid Reason: There are one or more double bonds between carbon atoms in unsaturated fatty acids
- Both Assertion and Reason are true and Reason is the correct explanation of the Assertion
- Both Assertion and Reason are true but the Reason is not the correct explanations of Assertion
- Assertion is true, but Reason is false.
- Both Assertion and Reason are false
Q. 9 of Quiz-1446 (Que-ID : 3935)
Which of the following influence feedback inhibition of enzyme?
- End product
- External factors
- Enzyme
- Substrate
Q. 10 of Quiz-1446 (Que-ID : 3936)
Which of the following is not a polysaccharide?
- Lactose
- Starch
- Glycogen
- Dextrin
Q. 11 of Quiz-1446 (Que-ID : 3937)
Inulin is made up of _______ and _______
- glucose and fructose
- glucose and fructose
- fructose and mannose
- mannose and glucose
Q. 12 of Quiz-1446 (Que-ID : 3938)
A protein having both structural and enzymatic traits is
- Collagen
- Trypsin
- Myosin
- Actin
Q. 14 of Quiz-1446 (Que-ID : 3940)
With reference to enzymes, which one of the following statements is true?
- Apoenzyme = Holoenzyme + Coenzyme
- Coenzyme = Apoenzyme + Holoenzyme
- Holoenzyme = Apoenzyme + Coenzyme
- Holoenzyme = Coenzyme ? Apoenzyme
Q. 15 of Quiz-1446 (Que-ID : 3941)
Inhibitor binds to the active site of the enzyme. Hence blocking the reaction. This is an example of
- allosteric inhibition
- feedback inhibition
- uncompetitive inhibition
- competitive inhibition
Q. 16 of Quiz-1446 (Que-ID : 3942)
The fastest enzyme known is
- DNA polymerase
- carbonic anhydrase
- carbonic dehydrogenase
- DNA ligase
Q. 18 of Quiz-1446 (Que-ID : 3944)
The minimum amount of energy required to initiate a chemical reaction is called
- enzymatic energy
- activation energy
- substrate energy
- initiation energy
Q. 19 of Quiz-1446 (Que-ID : 3945)
Enzymes, vitamins and hormones are common in
- Enhancing oxidative metabolism
- Being synthesised in the body of organisms
- Being proteinaceous
- Regulating metabolism
Q. 20 of Quiz-1446 (Que-ID : 3946)
Nitrogenous bases present in DNA
- Adenine, guanine, cytosine, uracil
- Adenine, guanine, cytosine, thymine
- Adenine, thymine, uracil
- Guanine, uracil
Q. 21 of Quiz-1446 (Que-ID : 3947)
Metabolic intermediates found in living system which are essential for growth and life is called___________
- Saponins
- Tannins
- Secondary metabolite
- Primary metabolites
Q. 22 of Quiz-1446 (Que-ID : 3948)
Enormous diversity of protein molecules is due to
- R groups of amino acids
- Sequence of amino acids
- Peptide bonds
- Amino groups of amino acids
Q. 23 of Quiz-1446 (Que-ID : 3949)
Anti-parallel strands of a DNA molecule mean that
- One strand turns anticlockwise
- Phosphate groups at the start of two DNA strands (poles) are in opposite position
- Phosphate groups of two DNA strands at their ends share the same position
- One strand turns clockwise
Q. 24 of Quiz-1446 (Que-ID : 3950)
The introduction of t-DNA into plants involves
- Altering the pH of the soil, then heat shocking the plants
- Exposing the plants to cold for a brief period
- Allowing the plant roots to stand in water
- Infection of the plant by Agrobacterium tumefaciens
Q. 25 of Quiz-1446 (Que-ID : 3951)
The most common monomer of carbohydrates is
- Sucrose
- Fructose
- Maltose
- Glucose
More MCQs In - Zoology Class 11th
Q. 4 of Quiz- (Que-ID : 2897)
Which one of the following events is correctly matched with the time period in a normal menstrual cycle ?
- Release of egg : 5 th day
- Endometrium regenerates : 5 – 10 days
- Endometrium secretes nutrients for implantation: 11 – 18 days
- Rise in progesterone level : 1 – 15 days
Q. 7 of Quiz- (Que-ID : 3050)
Malacophily means
- pollination by wind
- pollination by water
- pollination by insects
- pollination by snails
Q. 17 of Quiz- (Que-ID : 3185)
Frogs are beneficial to us because
- they protect crops
- they links food web
- they are food to man.
- all of these
Q. 19 of Quiz- (Que-ID : 3212)
Endodermis cells are rich in
- cellulose
- starch grains
- fibers
- resins and wax
Q. 18 of Quiz- (Que-ID : 2631)
Crypts in between bases of villi in intestine are known as
- Crypts of lieberkuhn
- Crypts of intestine
- Crypts of stomach
- None of the above
Q. 4 of Quiz- (Que-ID : 3147)
Enzymes increase the rate of reaction by
- lowering activation energy
- increasing activation energy
- increasing temperature and pH
- decreasing temperature and pH
Q. 20 of Quiz- (Que-ID : 3238)
The embryo in sunflower has
- one cotyledon
- two cotyledons
- many cotyledons
- no cotyledon
Q. 5 of Quiz- (Que-ID : 2823)
A diploid parent plant body produces ________ gametes and a haploid parent plant body produces ________gametes.
- diploid, haploid
- haploid, diploid
- diploid, diploid
- haploid, haploid
Q. 6 of Quiz- (Que-ID : 2724)
The purpose of botanical garden is to
- Preserve tropical plants
- Ex-situ conservation of germplasm
- Preserve wildlife
- Giving place for recreation
Q. 24 of Quiz- (Que-ID : 2667)
Which type of curve is formed when percent of haemoglobin is plotted against po2
- Straight line
- Hyperbola
- Sigmoid
- Parabola
Q. 6 of Quiz- (Que-ID : 3049)
Which one of the following describes the spikelet of a cereal or grass plant
- inferior ovary
- dehiscent fruit
- pair of glumes
- fused calyx
Q. 23 of Quiz- (Que-ID : 2992)
On average how much blood is filtered by kidney per minute
- 500-800ml
- 1100- 1200ml
- 1500-1700ml
- 1600-1800ml
Q. 13 of Quiz- (Que-ID : 565)
The speed of light was first measured by -
The speed of light was first measured by -
- Romer
- Newton
- Galileo
- Huygens
Q. 12 of Quiz- (Que-ID : 3230)
Srem modified to perform the function of a leaf and having many internodes is called as
- phylloclade
- cladode
- offset
- phyllode
Q. 25 of Quiz- (Que-ID : 3068)
Most of the enzymes of the TCA cycle are present in
- Intermembrane space of mitochondria
- Mitochondrial matrix
- Inner membrane of mitochondria
- Cytoplasm
Q. 7 of Quiz- (Que-ID : 2950)
Which was the last human chromosome to be completely sequenced ?
- Chromosome 1
- Chromosome 11
- Chromosome 21
- Chromosome X
Q. 9 of Quiz- (Que-ID : 3102)
Mineral salts which are absorbed by the roots from soil are in the form of
- Dilute solution
- Very concentrated solution
- Concentrated solution
- Very dilute solution
Q. 8 of Quiz- (Que-ID : 2621)
Which enzyme converts polysaccharides into disaccharides
- Amylases
- Lipases
- Salivary amylase
- None of the above
Q. 5 of Quiz- (Que-ID : 3048)
TCA cycle was discovered by
- Otto Meyerhof
- Hans Kreb
- Gustav Embden
- All of these
Q. 12 of Quiz- (Que-ID : 3105)
Which one of the following is not a micronutrient?
- Magnesium
- Molybdenum
- Boron
- Zinc
Q. 23 of Quiz- (Que-ID : 3491)
Biosphere means
- Atmosphere
- Lithosphere and ionosphered
- Atmosphere, lithosphere and hydrosphere
- Hydrosphere lithosphere and ionsophere
Q. 1 of Quiz- (Que-ID : 3419)
Desired properties of plants and Animals are possible by which reproduction?
- Genetic Engineering
- Chromosomal Engineering
- Ekabana technology
- Bonsai technology
Q. 8 of Quiz- (Que-ID : 2701)
Which among the following is auto immune disorder
- Tetany
- Arthritis
- Myasthenia gravis
- Gout
Q. 20 of Quiz- (Que-ID : 2838)
Select the monocarpic plant out of the following.
- Bamboo
- Litchi
- Mango
- all of these.
Q. 24 of Quiz- (Que-ID : 3192)
In mammals maximum energy is lost by the
- Respiration
- Urine
- Skin
- Stool
Q. 10 of Quiz- (Que-ID : 3028)
To prevent over – ripening, bananas should be
- given a dip in ascorbic acid
- maintained at room temperature
- refrigerated
- stored at the top of refrigerator
Q. 23 of Quiz- (Que-ID : 2916)
The process of release of spermatozoa from Sertoli cells into cavity of the seminiferous tubules is called
- spermiogenesis
- spermatogenesis
- spermatocytogenesis
- spermiation
Q. 14 of Quiz- (Que-ID : 3332)
A protein or polysaccharide molecule that stimulates antibody formation.
- antigen
- antibiotics
- exotoxin
- endotoxins
Q. 12 of Quiz- (Que-ID : 2980)
Bowman capsule with glomerulus is known as
- Malphigian body
- Renal corpuscle
- Malphigian capsule
- Both b and c
Q. 5 of Quiz- (Que-ID : 3123)
Which of the following is decreased during increase in humidity in the atmosphere?
- Transpiration
- Photosynthesis
- Respiration
- Glycolysis
Q. 16 of Quiz- (Que-ID : 3134)
Cohesion theory of water movement in plants was put forth by
- Henry Dixon
- F. F. Blackman
- Melvin cycle
- Hans. A. Krebs
Q. 1 of Quiz- (Que-ID : 2614)
Each tooth is embedded in a socket of jaw bone known as
- Thecodont
- Diphyodont
- Heterodont
- None of the above
Q. 20 of Quiz- (Que-ID : 2788)
Which of the following is correct?
- Musca domestica Order ? Diptera Family ? Muscidae Phylum ? Arthropoda
- Mangifera indica Order ? Sapindales Family ? Anacardiaceae Phylum ? Gymnospermae
- Triticum aestivum Order ? Poles Family ? Monocotyledons Phylum ? Angiospermae
- Panthera leo Order ? leo Family ? Felidae Phylum ? Mammalia
Q. 8 of Quiz- (Que-ID : 2826)
If a butterfly has chromosome number 360 in its meiocyte (2n). What will be the chromosome number in its gametes?
- 190
- 380
- 95
- 760
Q. 14 of Quiz- (Que-ID : 2657)
Solubility of CO2 is how many times higher than O2
- 10-15
- 30-40
- 20-21
- 20-25
Q. 11 of Quiz- (Que-ID : 3179)
The ciliated epithelium in our body may be found in
- trachea
- ureter
- bile duct
- intestines
Q. 23 of Quiz- (Que-ID : 3141)
What is the effect of turgor pressure in Munch hypothesis?
- Increase of turgor pressure
- Decrease of turgor pressure
- No change in turgor pressure
- independent to water potential gradient
Q. 23 of Quiz- (Que-ID : 3391)
Biogas is produced by
- aerobic breakdown of biomass
- anaerobic breakdown of biomass
- with the help of methanogenic bacteria
- both (b) and (c)
Q. 20 of Quiz- (Que-ID : 3038)
IAA is naturally occurring plant hormone called
- Gibberlin
- Auxin
- Cytokinin
- Absicic acid
Q. 6 of Quiz- (Que-ID : 2824)
Which of the following organisms has the highest number of chromosomes?
- Housefly
- Butterfly
- Ophioglossum
- Onion
Q. 8 of Quiz- (Que-ID : 3451)
The interaction where one species is benefitted and the other is neither benefitted nor harmed is called
- Commensalism
- Amensalism
- Mutualism
- None of the above
Q. 7 of Quiz- (Que-ID : 3225)
In Lathyrus, the leaves are modified into
- thorns
- cladodes
- tendrils
- spines
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