Category: NEET Biology Objective Questions

NEET Biology is the vey important paper in the medical entrance exam. Here, you will discover the NEET Biology MCQs and Answers for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Biology objective questions on air pollution . NEET Biology Cytoskeleton Multiple Choice Questions

MCQs on Cytoskeleton :

1. This statement is true
(a) microtubules are composed of tubulins
(b) microfilaments are composed of actin
(c) intermediate filaments are resistant to cytochalasin-B and colchicine
(d) all the above

Answer

Answer: (d)

2. What are flagella and cilia of eukaryotic cells made of?
(a) tubulin
(b) desmin
(c) lamin
(d) keratin

Answer

Answer: (a)

3. Cell lining of the lumen of the fallopian tube is involved in ciliary action to transport the egg from the ovary to the uterus. The cytoskeleton structure responsible for this movement is
(a) flagella
(b) microfilaments
(c) microtubules
(d) intermediate filaments

Answer

Answer: (c)

4. The intermediate filament found in hair and nail is a type I IF protein composed of
(a) tubulins
(b) keratins
(c) vimentins
(d) lamins

Answer

Answer: (b)

5. Malformation of these cytoskeleton structures can be linked to an inability to contract muscle
(a) microfilaments
(b) microtubules
(c) centrioles
(d) intermediate filaments

Answer

Answer: (a)

6. This is a microfilament inhibitor
(a) cytochalasin-B
(b) colchicine
(c) cinchonine
(d) aspirin

Answer

Answer: (a)

7. This is the most heterogenous type of cytoskeleton filament
(a) intermediate filaments
(b) microfilaments
(c) microtubules
(d) none of the above

Answer

Answer: (a)

8. This cell lacks cytoskeleton
(a) prokaryotic bacterial cells
(b) eukaryotic plant cell
(c) both (a) and (b)
(d) prokaryotic and eukaryotic animal cells

Answer

Answer: (a)

9. Microfilaments are composed of
(a) mosaic protein
(b) tubulin protein
(c) chitin protein
(d) actin protein

Answer

Answer: (d)

10. Network of microfilaments and microtubules is classified as
(a) cytoskeleton
(b) active skeleton
(c) vertebral skeleton
(d) endoplasmic skeleton

Answer

Answer: (b)

NEET Biology is the vey important paper in the medical entrance exam. Here, you will discover the NEET Biology MCQs and Answers for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Biology objective questions on air pollution . NEET Biology Gibberellin In Plants Multiple Choice Questions

MCQs on Gibberellin In Plants :

1. This is not a function of gibberellins
(a) promote dormancy
(b) promote cell elongation
(c) promote parthenocarpic fruit formation
(d) promote elongation of internodes

Answer

Answer: (a)

2. Elongation or lengthening of rosette plants is obtained by treating it with
(a) cytokinin
(b) gibberellin
(c) zeatin
(d) auxin

Answer

Answer: (b)

3. Generally, translocation of gibberellins is non-polar occurring through
(a) capillary rise
(b) phloem
(c) xylem
(d) both xylem and phloem

Answer

Answer: (b)

4. The gibberellin involved in flowering is
(a) GA1
(b) GA3
(c) GA4
(d) GA9

Answer

Answer: (d)

5. The earliest phases of synthesis of gibberellin occur in
(a) plastids
(b) mitochondria
(c) peroxisome
(d) cytoplasm

Answer

Answer: (a)

6. Nullification of genetic dwarfism is possible by spraying with
(a) zeatin
(b) auxin
(c) gibberellin
(d) cytokinin

Answer

Answer: (c)

7. The hormone involved in the regulation of florigen synthesis is
(a) zeatin
(b) gibberellin
(c) ethylene
(d) cytokinin

Answer

Answer: (b)

8. Gibberellins found in the aleurone layer of barley increases the transcription of
(a) lipase and cellulase
(b) protease and amylase
(c) protease and cellulase
(d) lipase and protease

Answer

Answer: (b)

9. This bioassay is used to test the presence of gibberellins
(a) dwarf pea elongation technique
(b) chlorophyll preservation test
(c) excised radish cotyledon enlargement test
(d) rice seedling growth inhibition test

Answer

Answer: (a)

10. Gibberellins were named after a fungus known as
(a) Gibberella acuminata
(b) Gibberella africana
(c) Gibberella fujikuroi
(d) Gibberella gaditijirrii

Answer

Answer: (c)

NEET Biology is the vey important paper in the medical entrance exam. Here, you will discover the NEET Biology MCQs and Answers for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Biology objective questions on air pollution . NEET Biology Reptilia Multiple Choice Questions

MCQs on Reptilia :

1. Find the correct statement about class Reptilia
(a) dry and cornified skin, epidermal scales and absence of external ears
(b) marine habitat, endoskeleton is cartilaginous and have placoid scales
(c) fresh-water habitat, bony endoskeleton and air-bladder for buoyancy
(d) moist skin and body is devoid of scales, the ear is represented by the tympanum

Answer

Answer: (a)

2. Reptilian ancestry of birds can be indicated by
(a) Eggs with the calcareous shell
(b) four-chambered heart
(c) scales on their hindlimb
(d) presence of crop and gizzard

Answer

Answer: (c)

3. Find the correctly matched pairs
(i) Sea Urchin – parapodia
(ii) Obelia – Metagenesis
(iii) Crocodile – four-chambered heart
(iv) Lemur – thecodont

(a) (ii), (iii) and (iv)
(b) only (i) and (ii)
(c) (i), (iii) and (iv)
(d) only (i) and (iv)

Answer

Answer: (a)

4. Uricotelism is found in
(a) frogs and toads.
(b) birds, land reptiles and insects
(c) mammals and birds
(d) fish and freshwater protozoans

Answer

Answer: (b)

5. Aquatic reptiles are
(a) ammonotelic
(b) ureotelic
(c) ureotelic over land
(d) ureotelic in water

Answer

Answer: (a)

6. Animals that get most affected by the change in the environmental temperature are
(a) aquatic
(b) homeothermic
(c) poikilothermic
(d) desert living

Answer

Answer: (c)

7. Bones of the reptiles are covered by
(a) Keratin
(b) Chitin
(c) Calcium
(d) none of the above

Answer

Answer: (a)

8. Which of the following is a living fossil?
(a) Dinosaurs
(b) Snakes
(c) Tuatara
(d) Lizards

Answer

Answer: (c)

9. The respiratory organ in reptiles is
(a) gills
(b) epidermis
(c) skin
(d) lungs

Answer

Answer: (d)

10. Find the correctly matched pair without any exceptions
(a) Chondrichthyes- cartilaginous endoskeleton
(b) Reptilia- 3 chambered heart with undivided ventricle
(c) Mammalia- viviparous
(d) Chordata- have mouth with a lower and upper jaw

Answer

Answer: (a)

NEET Biology is the vey important paper in the medical entrance exam. Here, you will discover the NEET Biology MCQs and Answers for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Biology objective questions on air pollution . NEET Biology Neural Communication Multiple Choice Questions

MCQs on Neural Communication :

1. The mode of communication between the neurons by sending electrical impulses known as _______.
(a) Membrane potentials
(b) Neuromodulators
(c) Neurotransmitters
(d) Action potentials

Answer

Answer: (d)

2. If the cell stimulation is strong, then the strength of the action potential produced would be ______.
(a) Weaker than the produced by weak stimulation
(b) Stronger than the produced by weak stimulation
(c) Double then the produced by the weak stimulation
(d) No different to the produced by weak stimulation

Answer

Answer: (d)

3. Dopamine, serotonin and noradrenaline are collectively called _______.
(a) Amines
(b) Hallucinogens
(c) Anxiolytics
(d) Neurotransmitters

Answer

Answer: (a)

4. The excess amount of produced neurotransmitters by presynaptic neurons is __________.
(a) Taken up by postsynaptic neurons
(b) Recycled back into the presynaptic neuron
(c) Removed and taken around the rest of the body
(d)  Eliminated by substances contained within the cell body

Answer

Answer: (b)

5. Acetylcholine is a neurotransmitter enabling communication between muscles and nerves. In case of an interruption in the interaction between acetylcholine and acetylcholine receptor sites on the muscles, this condition can occur in _______.
(a) Botulism
(b) Myasthenia gravis
(c) Multiple sclerosis
(d) Both A and B

Answer

Answer: (b)

6. Which of the following disorder causes dopamine neurons to die?
(a) Seizure disorder
(b) Multiple sclerosis
(c)Parkinson’s disease
(d) Lou Gehrig’s disease

Answer

Answer: (c)

7. Which of the following is a genetic disorder that induces neurons in the brain to drain away and die?
(a) Poliomyelitis
(b) Encephalitis
(c) Multiple sclerosis
(d) Huntington’s disease

Answer

Answer: (d)

8. Which of the following is called the common neurotransmitter?
(a) Acetylcholine
(b) Dopamine
(c) Serotonin
(d) All of the above

Answer

Answer: (d)

9. The cavity of the diencephalon is known as _______.
(a) First ventricle
(b) Third ventricle
(c) Second ventricle
(d)  Fourth ventricle

Answer

Answer: (b)

10. Which of the following is the cause for transmission of nerve impulse through nerve fibre in a single direction?
(a) Neurotransmitters released by dendrites.
(b) Neurotransmitters released by axon endings.
(c) Nerve fibre is insulated by a medullary sheath
(d) None of the above.

Answer

Answer: (b)

NEET Biology is the vey important paper in the medical entrance exam. Here, you will discover the NEET Biology MCQs and Answers for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Biology objective questions on air pollution . NEET Biology Ecosystem Multiple Choice Questions

MCQs on Ecosystem :

1. In an ecosystem, which one of the following types of entities occupies more than one trophic level?
(a) Frog
(b) Phytoplankton
(c) Zooplankton
(d) Fish

Answer

Answer: (d)

2. The rate at which food energy is assimilated at the trophic level of consumers is known as
(a) Gross primary productivity
(b) Net primary productivity
(c) Secondary productivity
(d) None of the above

Answer

Answer: (c)

3. Limitations of ecological pyramids involve all these statements, except
(a) they assume a simple food chain and do not consider food webs
(b) in the ecological pyramids, saprotrophs are not given any place
(c) they do not take into account the same species belonging to two or more trophic levels
(d) they do not represent relationships between organisms at different trophic levels

Answer

Answer: (d)

4. This entity will be the first one to colonize a bare rock
(a) Herbs and shrubs
(b) Annual plants
(c) Lichens
(d) Perennial plants

Answer

Answer: (c)

5. During ecological succession
(a) types and numbers of animals remain constant
(b) establishment of a new biotic community is fast in its primary phase
(c) predictable and gradual changes in species composition take place in a given area
(d) changes lead to a community that is in near equilibrium with the environment and is referred to as pioneer community

Answer

Answer: (c)

6. This ecosystem has the maximum biomass
(a) Grassland ecosystem
(b) Pond ecosystem
(c) Lake ecosystem
(d) Forest ecosystem

Answer

Answer: (d)

7. These are the primary producers of the deep-sea hydrothermal vent ecosystem
(a) blue-green algae
(b) coral reefs
(c) chemosynthetic bacteria
(d) green algae

Answer

Answer: (c)

8. This is a characteristic feature of cropland ecosystem
(a) Absence of weeds
(b) Ecological succession
(c) least genetic diversity
(d) absence of soil entities

Answer

Answer: (c)

9. At the producer level, if 20J of energy is trapped, then how much energy will be available to a peacock as food in the subsequent chain?
Plant -> Mice -> Snake -> Peacock
(a) 0.2 J
(b) 0.02 J
(c) 0.002 J
(d) 0.0002 J

Answer

Answer: (b)

10. Match from the columns and pick the correct option

Column I	Column II
Earthworm	Pioneer species
Succession	Detritivore
Ecosystem service	Natality
Population growth	Pollination

	A	B	C	D
(a)	1	2	3	4
(b)	4	1	3	2
(c)	3	2	4	1
(d)	2	1	4	3

Answer

Answer: (d)

NEET Biology is the vey important paper in the medical entrance exam. Here, you will discover the NEET Biology MCQs and Answers for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Biology objective questions on air pollution . NEET Biology Muscular Dystrophy Multiple Choice Questions

MCQs on Muscular Dystrophy :

1. One of the ways scientists suggest to find a treatment for muscular dystrophy is
(a) replacing muscles
(b) create customized diets for them to be healthier and stronger
(c) attempt to correct defective genes so it creates the right proteins
(d) none of these

Answer

Answer: (c)

2. Define muscular dystrophy
(a) Diseases which destruct the muscles of the body
(b) diseases which cause the muscles to get disproportionate
(c) born with too many or too little muscles
(d) diseases which do not allow muscles to grow

Answer

Answer: (a)

3. Muscular dystrophy can affect
(a) Only humans
(b) Only animals
(c) Both animals and humans
(d) Only plants

Answer

Answer: (c)

4. Another way that scientists propose as a treatment to cure muscular dystrophy is
(a) Removal of defective genes
(b) Replacing defective genes after removing with parents genes again
(c) Discovering chemicals which can substitute the missing chemical
(d) none of these

Answer

Answer: (c)

5. _____________ is not a form of muscular dystrophy
(a) Lunar dystrophy
(b) Myotonic dystrophy
(c) Duchenne muscular dystrophy
(d) Facioscapulohumeral dystrophy

Answer

Answer: (a)

6. The protein whose production gets affected in Duchenne muscular dystrophy is
(a) Actin
(b) Myotropin
(c) Dystrophin
(d) Leucovorin

Answer

Answer: (c)

7. The gene responsible for causing Duchenne muscular dystrophy is found on
(a) Y chromosome
(b) X chromosome
(c) Autosomal chromosome number 5
(d) Autosomal chromosome number 8

Answer

Answer: (b)

8. The enzyme, whose blood levels is increased in patients with Duchenne muscular dystrophy is
(a) Carbonic anhydrase
(b) Dystrophin kinase
(c) Adenosine triphosphate
(d) Creatinine phosphokinase

Answer

Answer: (d)

9. Duchenne muscular dystrophy can be cured with
(a) Allopurinol
(b) Creatinine phosphokinase inhibitors
(c) Corticosteroids
(d) None of these

Answer

Answer: (d)

10. The involvement of this muscle affects the breathing in Duchenne muscular dystrophy
(a) Triceps
(b) Biceps
(c) Diaphragm
(d) Quadriceps

Answer

Answer: (c)