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 Ecological Succession Multiple Choice Questions

MCQs on Ecological Succession :

1. In ecological succession, the intermediate developmental phase is known as
(a) ecesis
(b) climax
(c) nudation
(d) sere

Answer

Answer: (d)

2. This is true about secondary succession
(a) follows primary succession
(b) takes place on a deforested site
(c) is similar to primary succession except that it has a relatively slower pace
(d) begins on a bare rock

Answer

Answer: (b)

3. Lithosphere serves as a reservoir for
(a) nitrogen cycles
(b) carbon cycles
(c) oxygen cycles
(d) phosphorus cycles

Answer

Answer: (d)

4. This is not a climax vegetation
(a) grassess
(b) savannah
(c) forests
(d) hydrophytes

Answer

Answer: (d)

5. This about ecological succession is incorrect
(a) food chain relationships becomes more complex
(b) species diversity increases as succession proceeds
(c) role of decomposers becomes all the more important
(d) is a random process

Answer

Answer: (d)

6. An early seral community possesses this characteristic
(a) high species diversity
(b) open mineral cycling
(c) narrow niche specialization
(d) low community production

Answer

Answer: (b)

7. On sand, ecological succession is
(a) halosere
(b) xerosere
(c) hydrosere
(d) psammosere

Answer

Answer: (d)

8. Order of basic processes involved in succession is
(a) invasion -> stabilization -> completion and co action -> reaction -> nudation
(b) nudation -> stabilization -> completion and co action -> invasion -> reaction
(c) invasion -> nudation -> completion and co action -> reaction -> stabilization
(d) nudation -> invasion -> completion and co action -> reaction -> stabilization

Answer

Answer: (d)

9. Process of successful establishment of species in a new area is known as
(a) climax
(b) sere
(c) ecesis
(d) invasion

Answer

Answer: (c)

10. In an ecological succession, the final stable community is known as
(a) climax community
(b) ultimate community
(c) final community
(d) seral community

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 Linkage and Crossing Over Multiple Choice Questions

MCQs on Linkage and Crossing Over :

1. Crossing-over takes place in the
(a) Diakinesis stage
(b) Anaphase stage
(c) Pachytene stage
(d) Leptotene stage

Answer

Answer: (c)

2. There are 4 pairs of chromosomes in a Drosophila. The linkage groups present in it are
(a) one more than the pair of chromosomes
(b) one less than the pair of chromosomes
(c) four
(d) eight

Answer

Answer: (c)

3. Percentage of crossing over is more when
(a) genes are located in a different cell
(b) genes are not linked
(c) linked genes are located close to each other
(d) linked genes are located far apart from each other

Answer

Answer: (d)

4. If the percentage of crossing over between two genes is 10, then the distance between two genes will be
(a) 5 morganoid
(b) 10 morgan
(c) 20 centimorgans
(d) 40 map units

Answer

Answer: (b)

5. Alleles of different genes that are on the same chromosome can occasionally be separated by a phenomenon called
(a) crossing over
(b) continuous variation
(c) epistasis
(d) pleiotropy

Answer

Answer: (a)

6. Repulsion and coupling are two faces of
(a) mutation
(b) chiasmata
(c) linkage
(d) crossing over

Answer

Answer: (c)

7. If gene frequency between genes a and c is 2%; b and c is 13%; b and d 4%; a and b 15%; c and d 17 and a and d 19%. The sequence of genes in a chromosome is
(a) a,d,b,c
(b) d,b,a,c
(c) a,b,c,d
(d) a,c,b,d

Answer

Answer: (d)

8. This is the reason why Mendel did not recognize linkage phenomenon in his experiments
(a) he studied only pure plants
(b) he did not have a powerful microscope
(c) characters he studied were situated on different chromosomes
(d) many chromosomes to handle

Answer

Answer: (c)

9. In a linear chromosome map distance between 4 loci is as follows a-b is 10%, a-d is 3%, b-c is 4% and a-c is 6%. The crossover frequency between c and d is
(a) 4-12%
(b) 3-6%
(c) 9%
(d) 3%

Answer

Answer: (d)

10. Where does this evidence come from? – crossing over takes place at a four-stranded stage and not at two stranded stages of chromosomes.
(a) studies on linkage maps of chromosomes in Drosophila
(b) studies of meiosis in maize
(c) 4:4 organization of ascospores in Neurospora
(d) 2:2:2:2 organization of ascospores in Neurospora

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 Protozoa Multiple Choice Questions

MCQs on Protozoa :

1. Unicellular eukaryotes are grouped in
(a) Monera
(b) Protista
(c) Archaea
(d) Fungi

Answer

Answer: (b)

2. Which of the following organisms will vanish if all the ponds and puddles are destroyed?
(a) Plasmodium
(b) Trypanosoma
(c) Leishmania
(d) Ascaris

Answer

Answer: (a)

3. In Amoeba and Paramecium, the cell organelle for osmoregulation is
(a) nucleus
(b) body surface
(c) contractile vacuole
(d) pseudopodia

Answer

Answer: (c)

4. Which class does the malarial parasite belong to?
(a) dinophyceae
(b) sarcodina
(c) ciliata
(d) sporozoa

Answer

Answer: (d)

5. Protozoa are classified on the basis of
(a) locomotory organelle
(b) shape
(c) number of nuclei
(d) size

Answer

Answer: (a)

6. Organ of defense in protozoans is
(a) statocysts
(b) trichocysts
(c) otocysts
(d) nematocysts

Answer

Answer: (b)

7. Which of the following is not a characteristic feature of prtozoans
(a) binary fission
(b) contractile vacuole
(c) cell membrane as an outer body covering
(d) pseudopodia

Answer

Answer: (c)

8. Which of the following class of protozoa does not generally contain contractile vacuole?
(a) Sporozoa
(b) Rhizopoda
(c) Flagellata
(d) Cilliata

Answer

Answer: (a)

9. Trypanosoma belongs to which of the following group?
(a) mastigophora
(b) sarcodina
(c) sporozoa
(d) ciliata

Answer

Answer: (a)

10. Which of the following protozoan causes African sleeping sickness
(a) Plasmodium vivax
(b) Entamoeba gingivalis
(c) Trypanosoma lewsii
(d) Trypanosoma gambiense

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 Earthworm Digestive System Multiple Choice Questions

MCQs on Earthworm Digestive System :

1. The earthworm is placed under the group
(a) Polychaeta
(b) Hirudinea
(c) Oligochaeta
(d) Crustacea

Answer

Answer: (c)

2. The parasite found in the seminal vesicle of earthworms are
(a) Nosema
(b) Sarcocystis
(c) Monocystis
(d) Nyctotherus

Answer

Answer: (c)

3. The typhlosole in earthworm is related to
(a) respiration
(b) excretion
(c) absorption
(d) reproduction

Answer

Answer: (c)

4. Colour of the body in earthworms is due to the presence of
(a) Haemoglobin
(b) Blood
(c) Porphyrin
(d) Haemocyanin

Answer

Answer: (c)

5. Region of earthworm that is a forest of nephridia is
(a) Pharyngeal region
(b) Clitellar region
(c) Typhlosolar region
(d) Intestinal region

Answer

Answer: (b)

6. Chloragogen cells are found in
(a) Blood of earthworm
(b) The coelomic fluid of the earthworm
(c) Blood of cockroach
(d) The body wall of leucosolenia

Answer

Answer: (b)

7. This animal does not show any metamorphosis of larval stage
(a) Asteria
(b) Musca domestica
(c) Pheretima Posthuma
(d) Butterfly

Answer

Answer: (c)

8. The most effective organ for food digestion in earthworm is
(a) Mouth
(b) Buccal cavity
(c) Pharynx
(d) Stomach

Answer

Answer: (c)

9. The typhlosole found in Pheretima occurs in
(a) Stomach
(b) Intestine
(c) Oesophagus
(d) Gizzard

Answer

Answer: (b)

10. In earthworm, the mouth is located on
(a) Stomium
(b) Peristomium
(c) Prostomium
(d) Protostomium

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 Structure of Eye Multiple Choice Questions

MCQs on Structure of Eye :

1. The main function of the cornea present in the human eye is
(a) structural support to the eye
(b) bends light before it reaches the lens
(c) changes the shape of the lens enabling image to be focused on the retina
(d) contains a concentrated amount of cone cells on the correct orientation

Answer

Answer: (b)

2. The type of cells found in retina are
(a) Purkinje cells
(b) Schwann cells
(c) Neuroglial cells
(d) Amacrine cells

Answer

Answer: (d)

3. Where will the image of a distant object be formed when a person using a concave lens to correct vision, is not using glasses?
(a) behind retina
(b) in front of the retina
(c) on the blindspot
(d) on the yellow spot

Answer

Answer: (b)

4. A cornea transplant is never rejected in humans because
(a) it consists of enucleated cells
(b) it is a non-living layer
(c) it has no blood supply
(d) its cells are least penetrable by bacteria

Answer

Answer: (c)

5. This is an incorrect statement
(a) rhodopsin is the purplish-red protein situated in rods only
(b) Retinal is a derivative of Vitamin C
(c) Retinal is the light-absorbing part of visual photopigments
(d) the rods in the retina have rhodopsin, a photopigment while cones have three different photopigments

Answer

Answer: (b)

6. The fovea is the mammalian eye is the centre of the visual field wherein
(a) the optic nerve exits the eye
(b) only rods are found
(c) more rods than cones are found
(d) no rods but a high density of cones occur

Answer

Answer: (d)

7. In the human eye, the photosensitive compound is composed of
(a) guanosine and retinol
(b) transducin and retinene
(c) opsin and retinol
(d) opsin and retinal

Answer

Answer: (d)

8. The eye lens is
(a) Concave
(b) Convex
(c) Biconcave
(d) Biconvex

Answer

Answer: (d)

9. The persistence of vision for the human eye is
(a) 1/6th of a second
(b) 1/10th of a second
(c) 1/16th of a second
(d) 1/18th of a second

Answer

Answer: (c)

10. What does the tapetum lucidum do?
(a) it is the coloured part of the eye
(b) gives animals night vision
(c) transparent jelly-like fluid
(d) it is the area where the optic never attaches

Answer

Answer: (b)

11. The innermost layer and the most delicate layer of the eyeball where the photoreceptors are located are
(a) Chloroid
(b) Sclera
(c) Cornea
(d) Retina

Answer

Answer: (d)

12. This part of the eye dilates and contracts based on the environment
(a) Sclera
(b) Cornea
(c) Lens
(d) Pupil

Answer

Answer: (d)

13. The transparent lens in the human eye is held in its place by
(a) smooth muscles attached to the iris
(b) ligaments attached to the ciliary body
(c) ligaments attached to the iris
(d) smooth muscles attached to the ciliary body

Answer

Answer: (b)

14. The eye of octopus and the eye of cats show different patterns of structure, yet they perform similar functions. This is an example of
(a) Homologous organs that have evolved due to convergent evolution
(b) Homologous organs that have evolved due to divergent evolution
(c) Analogous organs that have evolved due to convergent evolution
(d) Analogous organs that have evolved due to divergent evolution

Answer

Answer: (c)

15. Which of these colours is least scattered by dust, fog, smoke?
(a) Yellow
(b) Red
(c) Blue
(d) Violet

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 Coronary artery Multiple Choice Questions

MCQs on Coronary artery :

1. Coronary artery disease (CAD) can be determined by this test
(a) Cardiac catherization
(b) Electrocardiogram
(c) Treadmill stress test
(d) all of these

Answer

Answer: (d)

2. The modifiable risk factor associated with coronary artery disease is
(a) Age
(b) Obesity
(c) Heredity
(d) Gender

Answer

Answer: (b)

3. This is one of the symptoms of Coronary artery disease
(a) Sleep problems
(b) Headache
(c) Diarrhoea
(d) Pain or discomfort in the chest, lower jaw or arms

Answer

Answer: (d)

4. If a stent is not used in a few cases who have coronary angioplasty done, the artery tends to narrow down or get blocked again in 6 months. This is more likely to happen if:
(a) one smokes
(b) one has unstable angina before the procedure
(c) one has diabetes
(d) all of these

Answer

Answer: (d)

5. Coronary angioplasty, part of CAD’s treatment involves:
(a) A new part of artery replaces the blocked section
(b) to expand artery, medication is used
(c) inflation of a tiny balloon inside an artery
(d) None of these

Answer

Answer: (c)

6. Doctors place a stent inside the artery during angioplasty. A stent is a
(a) A new fragment of the artery
(b) A wire mesh tube
(c) A cotton tube
(d) A slow-release medicine capsule

Answer

Answer: (b)

7. The __________ branches into Circumflex artery and left anterior descendary artery
(a) Left main coronary artery
(b) right marginal artery
(c) Posterior descendary artery
(d) None of these

Answer

Answer: (a)

8. One of these is not a symptom of acute coronary syndrome
(a) ST Segment elevation myocardial infarction
(b) Non ST segment elevation myocardial infarction
(c) unstable angina
(d) No episodes of dyspnea

Answer

Answer: (d)

9. Ischemia is
(a) restriction of blood supply to tissues
(b) Overflow of blood to tissues
(c) Inadequate deoxygenated blood carrying veins
(d) the medical term for shortness of breath

Answer

Answer: (a)

10. This is the role of the coronary artery
(a) to carry blood away from the heart muscles
(b) to supply blood to heart muscles
(c) to supply blood to all parts of the body
(d) none of these

Answer

Answer: (b)