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The minimum amount of energy required to initiate a chemical reaction is called
Biology Zoology Class 11th NEET UG NEET UG Preparation
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
Ans → (b)activation energy
Explanation → The minimum amount of energy required to initiate a chemical reaction is called activation energy
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
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
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
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
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
Q. 6 of Quiz-1447 (Que-ID : 3149)
Which of the following is not a pyrimidine?
- Uracil
- Cytosine
- Guanine
- Thymine
Q. 7 of Quiz-1447 (Que-ID : 3150)
Hydrolysis of starch occurs with the help of
- Peptidase
- Amylase
- Sucrose
- Lipase
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
Q. 9 of Quiz-1447 (Que-ID : 3152)
Which of the following influence feedback inhibition of enzyme?
- End product
- External factors
- Enzyme
- Substrate
Q. 10 of Quiz-1447 (Que-ID : 3153)
Which of the following is not a polysaccharide?
- Lactose
- Starch
- Glycogen
- Dextrin
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
Q. 12 of Quiz-1447 (Que-ID : 3155)
A protein having both structural and enzymatic traits is
- Collagen
- Trypsin
- Myosin
- Actin
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
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
Q. 16 of Quiz-1447 (Que-ID : 3159)
The fastest enzyme known is
- DNA polymerase
- carbonic anhydrase
- carbonic dehydrogenase
- DNA ligase
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
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
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
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
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
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
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
Q. 25 of Quiz-1447 (Que-ID : 3168)
The most common monomer of carbohydrates is
- Sucrose
- Fructose
- Maltose
- Glucose
More MCQs In - Biology Zoology Class 11th NEET UG NEET UG Preparation
Q. 7 of Quiz- (Que-ID : 3425)
Bt Toxin is :
- Intracellular lipid
- Intracellular crystal protein
- Extracellular Crystal protein
- Lipid
Q. 1 of Quiz- (Que-ID : 3269)
Rhodophyceae is called red algae because of the pigment
- Fucoxanthin
- Phycoerythrin
- Carotenoids
- Chlorophyll c
Q. 22 of Quiz- (Que-ID : 3265)
The animals with bilateral symmetry in young stage, and radial pentamerous symmetry in the adult stage, belong to the phylum
- Annelida
- Mollusca
- Cnidaria
- Echinodermata
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. 2 of Quiz- (Que-ID : 2720)
Which groups holds max nutritional diversity
- monera
- Plantae
- Fungi
- Anamalia
Q. 20 of Quiz- (Que-ID : 3238)
The embryo in sunflower has
- one cotyledon
- two cotyledons
- many cotyledons
- no cotyledon
Q. 20 of Quiz- (Que-ID : 3538)
Permissible noise levels in a residential area at night time is
- 35 dB
- 40 dB
- 45 dB
- 50 dB
Q. 12 of Quiz- (Que-ID : 3480)
That animal who can bear one third loss of water of one third body weight is
- Necturus
- Camel
- Wall Lizzard
- Kyton
Q. 8 of Quiz- (Que-ID : 3401)
Which of the following steps are catalysed by Taq polymerase in a PCR reaction?
- Denaturation of template DNA
- Annealing of primers to template DNA
- Extension of primer end on the template DNA
- All of the above
Q. 2 of Quiz- (Que-ID : 2845)
Anther is generally
- monosporangiate
- bisporangiate
- tetrasporangiate
- trisporangiate.
Q. 9 of Quiz- (Que-ID : 3002)
The major event that occurs during the anaphase of mitosis, which brings about the equal distribution of chromosomes, is
- splitting of the centromeres
- splitting of the chromatids
- replication of the genetic material
- condensation of the chromatin
Q. 1 of Quiz- (Que-ID : 3144)
Feedback inhibition of enzymes is affected by which of the following
- enzyme
- substrate
- end products
- intermediate end products
Q. 22 of Quiz- (Que-ID : 2790)
A group of closely related classes is called
- Genus
- Phylum
- Family
- Order
Q. 8 of Quiz- (Que-ID : 2676)
Which among the following WBC secrete histamine, serotonin,heparin
- Eosinophil
- Neutrophil
- Basophil
- None of the above
Q. 22 of Quiz- (Que-ID : 3265)
The animals with bilateral symmetry in young stage, and radial pentamerous symmetry in the adult stage, belong to the phylum
- Annelida
- Mollusca
- Cnidaria
- Echinodermata
Q. 14 of Quiz- (Que-ID : 2857)
In albuminous seeds, food is stored in _______ and in non albuminous seeds, it is stored in _______
- endosperm, cotyledons
- cotyledons, endosperm
- nucellus, cotyledons
- endosperm, radicle
Q. 3 of Quiz- (Que-ID : 3929)
Insulin is made up of _______ and _______.
- glucose and fructose
- glucose and fructose
- fructose and mannose
- mannose and glucose
Q. 20 of Quiz- (Que-ID : 3113)
NPK denotes
- Nitrogen, Protein, Kinetin
- Nitrogen, Protein, Potassium
- Nitrogen, Potassium, kinetin
- Nitrogen, Phosphorus, Potassium
Q. 24 of Quiz- (Que-ID : 3417)
Transgenic plants are develop by
- Introducing of foreign fenes
- Clone and genetically modified genes
- Genetic engineering
- Purified genes
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 : 3004)
Meiosis occurs for the human female in ______.
- Pancreas
- Liver
- Ovary
- Kidney
Q. 1 of Quiz- (Que-ID : 3519)
Which chemical substance affects the Ozone Layer?
- Chlorofluorocarbon
- Chlorine
- Hexafluorocarbon
- Molecular Carbon
Q. 20 of Quiz- (Que-ID : 2633)
Duct of paratoid gland are known as
- Rhenius
- Stensons
- Warton
- None of the above
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. 10 of Quiz- (Que-ID : 3936)
Which of the following is not a polysaccharide?
- Lactose
- Starch
- Glycogen
- Dextrin
Q. 19 of Quiz- (Que-ID : 2937)
Inheritance of roan coat in cattle is an example of
- incomplete dominance
- codominance
- multiple allelism
- none of these
Q. 20 of Quiz- (Que-ID : 3063)
One molecule of glucose yields ___ ATP molecules in aerobic respiration.
- 2
- 16
- 38
- 42
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. 3 of Quiz- (Que-ID : 2921)
What will be the distribution of phenotypic features in the first filial generation after a cross between a homozygous female and a heterozygous male for a single locus ?
- 3:01
- 1:02:01
- 1:01
- None of the above
Q. 9 of Quiz- (Que-ID : 2927)
Number of autosomes present in liver cells of a human female is
- 22 autosomes
- 22 pairs
- 23 autosomes
- 23 pairs
Q. 22 of Quiz- (Que-ID : 3140)
Proteins that form huge pores in the membrane of the certain organelles and bacteria are called as
- Porins
- Pressure gradient
- Enzymes
- Flaccid
Q. 10 of Quiz- (Que-ID : 3278)
Gymnosperms produce neither flower nor fruit because they do not possess
- Embryo
- Ovary
- Ovule
- Seed
Q. 5 of Quiz- (Que-ID : 3398)
The DNA polymerase enzyme used in PCR is obtained from
- Thermus aquaticus
- Escherichia coli
- Agrobacterium tumefaciens
- Salmonella typhimurium
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. 11 of Quiz- (Que-ID : 2804)
Which one of the following is the correct statement regarding the particular psychotropic drug specified?
- Barbiturates cause relaxation and temporary euphoria
- Hashish causes after thought perceptions and hallucinations
- Opium stimulates nervous system and causes hallucinations
- Morphine leads to delusions and disturbed emotions
Q. 23 of Quiz- (Que-ID : 3266)
Which blood vessel carry larva of Ascaris in lungs
- Pulmonary vein
- Hepatic vein
- Carotid artery
- Pulmonary artery
Q. 14 of Quiz- (Que-ID : 3107)
Insectivorous plants grow where
- There is carbohydrate deficient soil
- There is nitrogen deficient soil
- Vitamin c is required
- Hormones are required
Q. 25 of Quiz- (Que-ID : 2793)
The taxonomic unit ?Phylum? in the classification of animals is equivalent to which hierarchical level in classification of plants?
- Class
- Order
- Family
- Division
Q. 14 of Quiz- (Que-ID : 3282)
In gymnosperms, the development of pollen grains occurs in
- Strobili
- Microsporangia
- Megasporangia
- Macrosporangia
Q. 16 of Quiz- (Que-ID : 2859)
Spiny or sticky pollen grains and large, attractively coloured flowers are associated with
- hydrophily
- entomophily
- ornithophily
- anemophily
Q. 5 of Quiz- (Que-ID : 2618)
Which kind of gland is pancreas
- Exocrine
- Endocrine
- Compound gland
- None of the above
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. 22 of Quiz- (Que-ID : 3390)
Process of biogas production is
- aerobic process
- anaerobic process
- active process
- passive process
Q. 16 of Quiz- (Que-ID : 3109)
Toxicity of which element leads to the appearance of brown spots on leaves
- Mg
- Mn
- Fe
- Cu
Q. 20 of Quiz- (Que-ID : 3463)
Submerged hydrophytes have disseced leaves for
- Decreasing surface area
- Increasing surface area
- Reducing effect pf water currents
- Increasing number of stomata
Q. 7 of Quiz- (Que-ID : 3525)
Chlorofluoro carbon are responsible for
- Acid rain
- Ozone layer depletion
- Global warming
- Thermal inversion
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