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Which of the following statements regarding enzyme inhibition is correct?

Biology Zoology Class 11th NEET UG NEET UG Preparation

Q. 5 of Quiz-1447 (Que-ID : 3148)

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

Ans → (c)Competitive inhibition is seen when the substrate and the inhibitor compete for the active site on the enzyme

Explanation → Competitive inhibition is seen when the substrate and the inhibitor compete for the active site on the enzyme

This question is taken from this post → Biomolecules : Biology Revision Test (Class 11th) | MCQs for NEET - attemp/practice


More MCQs in - Biomolecules : Biology Revision Test (Class 11th) | MCQs for NEET

Q. 1 of Quiz-1447 (Que-ID : 3144)

Feedback inhibition of enzymes is affected by which of the following

  • enzyme
  • substrate
  • end products
  • intermediate end products

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Q. 2 of Quiz-1447 (Que-ID : 3145)

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

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Q. 3 of Quiz-1447 (Que-ID : 3146)

Insulin is made up of _______ and _______.

  • glucose and fructose
  • glucose and fructose
  • fructose and mannose
  • mannose and glucose

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Q. 4 of Quiz-1447 (Que-ID : 3147)

Enzymes increase the rate of reaction by

  • lowering activation energy
  • increasing activation energy
  • increasing temperature and pH
  • decreasing temperature and pH

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Q. 5 of Quiz-1447 (Que-ID : 3148)

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

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Q. 6 of Quiz-1447 (Que-ID : 3149)

Which of the following is not a pyrimidine?

  • Uracil
  • Cytosine
  • Guanine
  • Thymine

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Q. 7 of Quiz-1447 (Que-ID : 3150)

Hydrolysis of starch occurs with the help of

  • Peptidase
  • Amylase
  • Sucrose
  • Lipase

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Q. 8 of Quiz-1447 (Que-ID : 3151)

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

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Q. 9 of Quiz-1447 (Que-ID : 3152)

Which of the following influence feedback inhibition of enzyme?

  • End product
  • External factors
  • Enzyme
  • Substrate

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Q. 10 of Quiz-1447 (Que-ID : 3153)

Which of the following is not a polysaccharide?

  • Lactose
  • Starch
  • Glycogen
  • Dextrin

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Q. 11 of Quiz-1447 (Que-ID : 3154)

Inulin is made up of _______ and _______

  • glucose and fructose
  • glucose and fructose
  • fructose and mannose
  • mannose and glucose

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Q. 12 of Quiz-1447 (Que-ID : 3155)

A protein having both structural and enzymatic traits is

  • Collagen
  • Trypsin
  • Myosin
  • Actin

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Q. 13 of Quiz-1447 (Que-ID : 3156)

NADP contains vitamin ______

  • B1
  • B2
  • B3
  • B12

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Q. 14 of Quiz-1447 (Que-ID : 3157)

With reference to enzymes, which one of the following statements is true?

  • Apoenzyme = Holoenzyme + Coenzyme
  • Coenzyme = Apoenzyme + Holoenzyme
  • Holoenzyme = Apoenzyme + Coenzyme
  • Holoenzyme = Coenzyme – Apoenzyme

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Q. 15 of Quiz-1447 (Que-ID : 3158)

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

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Q. 16 of Quiz-1447 (Que-ID : 3159)

The fastest enzyme known is

  • DNA polymerase
  • carbonic anhydrase
  • carbonic dehydrogenase
  • DNA ligase

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Q. 17 of Quiz-1447 (Que-ID : 3160)

Lecithin is a

  • polysaccharide
  • protein
  • nucleic acid
  • lipid

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Q. 18 of Quiz-1447 (Que-ID : 3161)

The minimum amount of energy required to initiate a chemical reaction is called

  • enzymatic energy
  • activation energy
  • substrate energy
  • initiation energy

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Q. 19 of Quiz-1447 (Que-ID : 3162)

Enzymes, vitamins and hormones are common in

  • Enhancing oxidative metabolism
  • Being synthesised in the body of organisms
  • Being proteinaceous
  • Regulating metabolism

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Q. 20 of Quiz-1447 (Que-ID : 3163)

Nitrogenous bases present in DNA

  • Adenine, guanine, cytosine, uracil
  • Adenine, guanine, cytosine, thymine
  • Adenine, thymine, uracil
  • Guanine, uracil

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Q. 21 of Quiz-1447 (Que-ID : 3164)

Metabolic intermediates found in living system which are essential for growth and life is called___________

  • Saponins
  • Tannins
  • Secondary metabolite
  • Primary metabolites

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Q. 22 of Quiz-1447 (Que-ID : 3165)

Enormous diversity of protein molecules is due to

  • R groups of amino acids
  • Sequence of amino acids
  • Peptide bonds
  • Amino groups of amino acids

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Q. 23 of Quiz-1447 (Que-ID : 3166)

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

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Q. 24 of Quiz-1447 (Que-ID : 3167)

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

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Q. 25 of Quiz-1447 (Que-ID : 3168)

The most common monomer of carbohydrates is

  • Sucrose
  • Fructose
  • Maltose
  • Glucose

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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

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Q. 11 of Quiz- (Que-ID : 3229)

In banana, the stem is

  • underground only
  • both underground and aerial
  • absent
  • aerial only

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Q. 14 of Quiz- (Que-ID : 2882)

In which of the following weeks of pregnancy CVS is done ?

  • 12th – 14th week
  • 8th – 10th week
  • 5th – 7th week
  • None of these

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Q. 10 of Quiz- (Que-ID : 2678)

which blood group is known as universal donor

  • AB
  • 0
  • A
  • B

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Q. 23 of Quiz- (Que-ID : 3366)

Which of the following is incorrectly matched ?

  • Black rot of crucifers Bacteria
  • Brown rust of wheat Fungi
  • Late blight of potato Virus
  • Red rot of sugarcane Fungi

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Q. 5 of Quiz- (Que-ID : 3473)

Submerged Rooted Hydrophyte are:

  • Uticularia
  • Prapa
  • Nymphea
  • vallisnaria

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Q. 16 of Quiz- (Que-ID : 3409)

Golden rice is a promising transgenic crop. When released for cultivation, it will help in :

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  • High vitamin A content

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Q. 16 of Quiz- (Que-ID : 2734)

Classification is not based on

  • Thallus organisation
  • Cell structure
  • Gross morphology
  • Phylogenetic relationship

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Q. 4 of Quiz- (Que-ID : 3047)

Which enzyme catalyses the reaction below? Pyruvic acid → Carbon dioxide + Ethanol

  • Pyruvic acid decarboxylase
  • Alcohol dehydrogenase
  • None of these
  • Both of these

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Q. 9 of Quiz- (Que-ID : 3302)

Which of the following evidences does not favour the Lamarckian concept of inheritance of acquired characters ?

  • Lack of pigment in cave-dwelling animlas
  • Melanisation in peppered moth
  • Absence of limbs in snakes
  • Presence of webbed toes in aquatic birds

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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

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Q. 14 of Quiz- (Que-ID : 2707)

Which joint is present between carpal and metacarpal of thumb

  • Saddle joint
  • Pivot
  • Hinge
  • Condyloid

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Q. 11 of Quiz- (Que-ID : 2754)

Endemic goitre is a state of

  • Increased thyroid function
  • Normal thyroid function
  • Decreased thyroid function
  • Moderate thyroid function

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Q. 19 of Quiz- (Que-ID : 3162)

Enzymes, vitamins and hormones are common in

  • Enhancing oxidative metabolism
  • Being synthesised in the body of organisms
  • Being proteinaceous
  • Regulating metabolism

Discuss View Answer

Q. 2 of Quiz- (Que-ID : 2695)

How many bones are present in axial skeleton

  • 82
  • 80
  • 87
  • 85

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Q. 21 of Quiz- (Que-ID : 2764)

Master endocrine gland is

  • Pituitary
  • Parathyroid
  • Thyroid
  • Pineal

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Q. 8 of Quiz- (Que-ID : 3351)

Continued inbreeding, especially close inbreeding generally results in

  • inbreeding depression
  • inbreeding stimulation
  • inbreeding hybridisation
  • inbreeding mutation

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Q. 10 of Quiz- (Que-ID : 2803)

When a neuron is in resting state i.e. not conducting any impulse, the axonal membrane is

  • Comparatively more permeable to K+ ions and nearly impermeable to Na+ ions
  • Comparatively more permeable to Na+ ions and nearly impermeable to K+ ions
  • Equally permeable to both Na+ and K+ ions
  • Impermeable to both Na+ and K+ ions

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Q. 21 of Quiz- (Que-ID : 3264)

One of the following are not formed in mosquito

  • Sporozoites
  • Ookinetes
  • Oocystes
  • Merozoites

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Q. 8 of Quiz- (Que-ID : 2776)

Solanum, panthera, homo are examples of

  • Family
  • Division
  • genera
  • Species epithet

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Q. 15 of Quiz- (Que-ID : 2958)

In DNA strand, the nucleotides are linked together by

  • glycosidic bonds
  • phosphodiester bonds
  • peptide bonds
  • hydrogen bonds

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Q. 14 of Quiz- (Que-ID : 3057)

Aleurone layer takes part in

  • protection of delicate embryo
  • enzyme synthesis
  • transfer of food to cotyledons
  • transfer of food from cotyledons to embryo tips

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Q. 9 of Quiz- (Que-ID : 3502)

Kanha National Park is famous for

  • Birds
  • Rhinoceros
  • Tigers
  • Crocodiles

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Q. 12 of Quiz- (Que-ID : 2805)

The function of vagus nerve innervating the heart is to

  • Initiate the heart beat
  • Reduce the heart beat
  • Accelerate the heart beat
  • Maintain constant heart beat

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Q. 6 of Quiz- (Que-ID : 2824)

Which of the following organisms has the highest number of chromosomes?

  • Housefly
  • Butterfly
  • Ophioglossum
  • Onion

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Q. 16 of Quiz- (Que-ID : 3359)

Multiple ovulation embryo transfer technology is related to

  • transfer of super embryo
  • transfer of super eggs
  • super ovulation and embryo transfer
  • both (a) and (b)

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Q. 19 of Quiz- (Que-ID : 2632)

What are the structural and functional units of liver

  • Hepatic cells
  • Hepatic lobules
  • Hepatic glands
  • None of the above

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Q. 4 of Quiz- (Que-ID : 2722)

Name the classification based on genetic and evolutionary relationship

  • Phonetics
  • Biosynthesis
  • Numerical taxonomy
  • Cladistics

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Q. 21 of Quiz- (Que-ID : 2634)

Which is not the part of stomach

  • Cardiac
  • Pyloric
  • Funds
  • Ileum

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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

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Q. 25 of Quiz- (Que-ID : 2718)

Atlas is which vertebrae among the following

  • 1st
  • Last
  • 5th
  • 7th

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Q. 13 of Quiz- (Que-ID : 2706)

Which among the following are involuntary muscles

  • Cardiac
  • Skeletal
  • Smooth
  • Both a and c

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Q. 4 of Quiz- (Que-ID : 3247)

The clam nervous system is composed of

  • labial palps
  • one pair of ganglia
  • two pairs of ganglia
  • three pairs of ganglia

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Q. 15 of Quiz- (Que-ID : 2984)

Which loop of hence is permeable to water

  • Descending loop
  • Ascending loop
  • Both the loops
  • None of the above

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Q. 22 of Quiz- (Que-ID : 2965)

Find out the wrong statement about heterochromatin,

  • It is densely packed
  • It stains dark
  • It is transcriptionally active.
  • It is late replicating

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Q. 17 of Quiz- (Que-ID : 3135)

Diffusion rate is affected by

  • temperature
  • membrane permeability
  • gradient of concentration
  • all of these

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Q. 13 of Quiz- (Que-ID : 2856)

Persistent nucellus is called as _______ and is found in _______.

  • perisperm, black pepper
  • perisperm, groundnut
  • endosperm, black pepper
  • endosperm groundnut

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Q. 3 of Quiz- (Que-ID : 2746)

In adults insufficient thyroxine lead to

  • Myxoedema
  • Goitre
  • Tetany
  • Cretinism

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Q. 21 of Quiz- (Que-ID : 2764)

Master endocrine gland is

  • Pituitary
  • Parathyroid
  • Thyroid
  • Pineal

Discuss View Answer

Q. 2 of Quiz- (Que-ID : 3070)

The end product of the Calvin cycle is ______.

  • RuBP
  • PGAL
  • PGA
  • ADP + NADP

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Q. 11 of Quiz- (Que-ID : 3179)

The ciliated epithelium in our body may be found in

  • trachea
  • ureter
  • bile duct
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Q. 4 of Quiz- (Que-ID : 2797)

The cutaneous plexus and the papillary plexus consist of

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  • Gland cells that release cutaneous secretions

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Q. 12 of Quiz- (Que-ID : 3455)

A stage of suspended development is called

  • Diapause
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  • Migrate
  • Aestivation

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Q. 10 of Quiz- (Que-ID : 2878)

The correct surgical procedure as a contraceptive method is

  • ovariectomy
  • hysterectomy
  • vasectomy
  • castration

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Q. 9 of Quiz- (Que-ID : 3377)

The symbiotic association between fungi and roots of higher plants is referred to as

  • lichen
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Q. 7 of Quiz- (Que-ID : 3175)

The vascular tissue of blood is made up of

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  • all of the above

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Q. 6 of Quiz- (Que-ID : 2674)

Plasma without clotting factor is known as

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  • Both a and b
  • None of the above

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