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Lecithin is a
Q. 17 of Quiz-1446 (Que-ID : 3943)
Lecithin is a
- polysaccharide
- protein
- nucleic acid
- lipid
Ans → (d)lipid
Explanation → Lecithin is a phospholipid.
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. 15 of Quiz- (Que-ID : 2628)
Maltase converts maltose into
- glucose+ glucose
- Glucose + fructose
- Glucose + galactose
- Fatty acids+ glycerol
Q. 23 of Quiz- (Que-ID : 3291)
By which type of leaf is found in selaginella
- Aligulate and microphyllous
- Ligulate and megaphyllous
- Ligulate and microphyllous
- Aligulate and megaphyllous
Q. 9 of Quiz- (Que-ID : 2827)
In flowering plants, both male and female gametes are non-motile. The method to bring them together for fertilisation is
- water
- air
- pollination
- apomixis
Q. 24 of Quiz- (Que-ID : 3017)
Crossing over results the exchange of genetic material, which occurs between
- Non-sister chromosomes
- Sister chromatids
- Non-homologous chromosome
- Homologous chromosomes
Q. 7 of Quiz- (Que-ID : 2800)
Vestibular apparatus is made up of three semi circular canals. These canals lies at ____ degree angle to each other.
- 30
- 45
- 60
- 90
Q. 14 of Quiz- (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. 20 of Quiz- (Que-ID : 2963)
Histone proteins are
- basic, negatively charged
- basic, positively charged
- acidic, positively charged
- acidic, negatively charged
Q. 12 of Quiz- (Que-ID : 3005)
Choose the correct sequence. A. Pachytene B. Zygotene C. Leptotene D. Diakinesis E. Diplotene
- C, B, A, D, E
- C, A, B, E, D
- C, B, A, E, D
- D, B, C, E, A
Q. 2 of Quiz- (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. 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
Q. 18 of Quiz- (Que-ID : 2911)
In humans, at the end of the first meiotic division, the male germ cells differentiate into the
- spermatids
- spermatogonia
- primary spermatocytes
- secondary spermatocytes
Q. 9 of Quiz- (Que-ID : 3377)
The symbiotic association between fungi and roots of higher plants is referred to as
- lichen
- mycorrhiza
- biofertiliser
- biocontrol agent
Q. 14 of Quiz- (Que-ID : 3007)
Lampbrush chromosomes are observed in
- Mitotic prophase
- Mitotic metaphase
- Meiotic metaphase
- Meiotic prophase
Q. 9 of Quiz- (Que-ID : 2802)
There are ______ pairs of cranial nerves arising from the brain.
- 8
- 12
- 18
- 25
Q. 22 of Quiz- (Que-ID : 2665)
Whose role in respiratory rhythm regulation is insignificant
- Co2
- O2
- Both a and b
- None of the above
Q. 8 of Quiz- (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. 25 of Quiz- (Que-ID : 2843)
Which of the following animals show menstrual cycle?
- Gorillas and chimpanzees
- Monkeys and humans
- Orangutans and monkeys
- All of these
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. 18 of Quiz- (Que-ID : 572)
photosynthesis takes place faster in
photosynthesis takes place faster in
- darkness
- red light
- white light
- yellow light
Q. 17 of Quiz- (Que-ID : 2710)
Sarcoplasmic reticulum is store house of which ion
- Ca2+
- Mg2+
- Mn2+
- None of the above
Q. 4 of Quiz- (Que-ID : 3322)
Typhoid fever in human beings is caused by
- Plasmodium vivax
- Trichophyton
- Salmonella typhi
- Rhinoviruses
Q. 5 of Quiz- (Que-ID : 3248)
Choose the correct pair.
- Hippocampus – 3-chambered heart
- Rana – 2-chambered heart
- Crocodilus – 4-chambered heart
- Pavo – 3-chambered heart
Q. 19 of Quiz- (Que-ID : 2762)
The phase of menstrual cycle that last for 7-8 days are
- Ovulatory
- Menstruation
- Luteal
- Follicular
Q. 23 of Quiz- (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. 11 of Quiz- (Que-ID : 3154)
Inulin is made up of _______ and _______
- glucose and fructose
- glucose and fructose
- fructose and mannose
- mannose and glucose
Q. 1 of Quiz- (Que-ID : 3927)
Feedback inhibition of enzymes is affected by which of the following
- enzyme
- substrate
- end products
- intermediate end products
Q. 1 of Quiz- (Que-ID : 3169)
Blood corpuscles are formed in the
- Haversian canal
- endosteum
- red bone marrow
- pancreas
Q. 20 of Quiz- (Que-ID : 2633)
Duct of paratoid gland are known as
- Rhenius
- Stensons
- Warton
- None of the above
Q. 16 of Quiz- (Que-ID : 3184)
Tendons connect the following
- bone to bone
- muscle to muscle
- cartilage to muscle
- bone to muscle
Q. 5 of Quiz- (Que-ID : 2723)
What is the purpose of taxonomy
- Explain the origin of life
- Identification of unknown species
- To search history of evolution
- Identify medicinal plants
Q. 4 of Quiz- (Que-ID : 3422)
Adjoining of exotic gene in crop is called :
- Genetic Engineering
- Bio architecture
- Tissue culture
- Immunisation
Q. 8 of Quiz- (Que-ID : 2726)
Common feature of archaebacteria
- Structure of cell membrane
- Structure of cell wall
- Has fatty acid synthetase
- Structure of flagellin protein
Q. 6 of Quiz- (Que-ID : 3149)
Which of the following is not a pyrimidine?
- Uracil
- Cytosine
- Guanine
- Thymine
Q. 12 of Quiz- (Que-ID : 2830)
The term ‘clone’ cannot be applied to offspring formed by sexual reproduction because
- offspring do not possess exact copies of parental DNA
- DNA of only one parent is copied and passed on to the offspring
- offspring are formed at different times
- DNA of parent and offspring are completely different
Q. 14 of Quiz- (Que-ID : 3182)
Spot the salivary gland in the following :
- sublingual
- adrenal
- Brunners
- lacrimal
Q. 11 of Quiz- (Que-ID : 2879)
RCH stands for
- routine check-up of health
- reproduction cum hygiene
- reversible contraceptive hazards
- reproductive and child health care
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 : 2744)
Which hormones is a stress hormone
- Norepinephrine
- Androgen
- Cortisol
- FSH
Q. 11 of Quiz- (Que-ID : 3254)
Which of the following is a pseudocoelomate?
- Platyhelminthes
- Aschelminthes
- Mollusca
- Hemi-chordates
Q. 6 of Quiz- (Que-ID : 2749)
Anabolic steroids are ___ versions of testosterone
- Effective
- Synthetic
- Natural
- Ineffective
Q. 22 of Quiz- (Que-ID : 2815)
Neurons are excitable cells because the membrane is
- Non polar
- Apolar
- polar
- None of these
Q. 9 of Quiz- (Que-ID : 2877)
Condoms are one of the most popular contraceptives because of the following reasons.
- These are effective barriers for insemination
- They do not interfere with coital act
- These help in reducing the risk of STDs
- All of the above
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. 24 of Quiz- (Que-ID : 3067)
Number of oxygen atoms required for aerobic oxidation of one pyruvate
- 10
- 8
- 5
- 12
Q. 8 of Quiz- (Que-ID : 3476)
Small extremite animals of tropical region
- Allen’s law
- Bergmen’s law
- Dollo’s law
- Cope’s law
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