300+ REAL TIME NEET Biology Objective Questions & Answers 2023

300+ TOP MCQs on Female Reproductive System and Answers

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 Female Reproductive System Multiple Choice Questions

MCQs on Female Reproductive System :

1. Layer of cells immediately surrounding the ovum but outside the zona pellucida is called as
(a) germinal epithelium
(b) corona radiata
(c) theca interna
(d) membrana granulosa

Answer

Answer: (b)

2. Corpus luteum is the source of secretion of
(a) LH
(b) Estradiol
(c) Estrogen
(d) Progesterone

Answer

Answer: (d)

3. The membrane investing the ovum just outside the membrana granulosa is
(a) theca interna
(b) discus proligerus
(c) zona pellucida
(d) vitelline membrane

Answer

Answer: (a)

4. In the female rabbit, the expanded proximal part of the oviduct is known as
(a) fimbriated funnel
(b) uterus
(c) vagina
(d) vestibule

Answer

Answer: (b)

5. If after ovulation, pregnancy does not take place, then the corpus luteum
(a) produces lot of relaxin and oxytocin
(b) degenerates in a short time
(c) is maintained in the presence of progesterone
(d) becomes active and secretes a lot of LH and FSH

Answer

Answer: (b)

6. Graafian follicle are characteristically found in the
(a) ovary of frog
(b) testis of mammal
(c) thyroid of mammal
(d) ovary of mammal

Answer

Answer: (d)

7. In female mammals, Bartholin’s glands open into the
(a) fallopian tubes and release a secretion which makes sperms motile
(b) uterus and release a lubricating fluid during the birth of young ones
(c) urinary bladder and assist in the release of urine
(d) vestibule and release a lubricating fluid in the vagina

Answer

Answer: (d)

8. After ovulation, the Graafian follicle becomes an endocrine organ called
(a) fibrin
(b) ovarian tube
(c) globulin
(d) corpus luteum

Answer

Answer: (d)

9. The nutritive medium for the ejaculated sperms is given by
(a) fallopian tube
(b) vaginal fluid
(c) seminal fluid
(d) uterine lining

Answer

Answer: (c)

10. The stroma of the ovary consists of blood vessels, nerves, muscle fibres and a type of protein called
(a) Fibrin
(b) Collagen
(c) Albumin
(d) Globulin

Answer

Answer: (b)

300+ TOP MCQs on Apoptosis and Answers

MCQs on Apoptosis :

1. This is an extracellular messenger of apoptosis
(a) tumor necrosis factor
(b) serine
(c) translation inhibitor
(d) ribozyme

Answer

Answer: (a)

2. This is concerned with the intrinsic pathway of apoptosis
(a) cytochrome d
(b) cytochrome c
(c) cytochrome b
(d) cytochrome a

Answer

Answer: (b)

3. Apoptotic bodies can be recognized with the presence of these on the surface
(a) phosphatidyl tyrosine
(b) phosphatidylinositol
(c) phosphatidylcholine
(d) phosphatidylserine

Answer

Answer: (d)

4. Apoptotic cells detach due to the inactivation of this
(a) PKC
(b) PKB
(c) RAF1
(d) FAK

Answer

Answer: (d)

5. Shrinking of nucleus is caused when this inactivates
(a) gelsolin
(b) tubulin
(c) actin
(d) lamin

Answer

Answer: (d)

6. This cell organelle participates actively in animal apoptosis
(a) nucleus
(b) vacuoles
(c) mitochondria
(d) chloroplast

Answer

Answer: (c)

7. This can stimulate cytochrome release from mitochondria
(a) Akt
(b) Bid
(c) Bad
(d) Smac

Answer

Answer: (b)

8. This cannot be killed by apoptosis
(a) immune cells
(b) cells with DNA damage
(c) cancer cells
(d) cell infected with viruses

Answer

Answer: (c)

9. This is an anti apoptotic protein
(a) Bim
(b) Bcl-Xs
(c) Bfl 1
(d) NOXA

Answer

Answer: (c)

10. This is an active cell death process
(a) necrosis
(b) lysis
(c) apoptosis
(d) senescence

Answer

Answer: (c)

300+ TOP MCQs on Diffusion and Answers

MCQs on Diffusion :

1. Phenomena through which water is absorbed by solids such as colloids leading them to increase in volume is
(a) diffusion
(b) imbibition
(c) facilitated diffusion
(d) osmosis

Answer

Answer: (a)

2. In older dying leaves to younger leaves, the mineral ions are assimilated into
(a) deposition of organic and inorganic compounds
(b) organic compound
(c) inorganic compounds
(d) none of these

Answer

Answer: (b)

3. Passage of water across a selectively permeable membrane is
(a) osmosis
(b) active transport
(c) facilitated diffusion
(d) pinocytosis

Answer

Answer: (a)

4. Wall pressure will______________ with rise in turgidity
(a) increase
(b) decrease
(c) remain unaffected
(d) fluctuate

Answer

Answer: (b)

5. Most effective light for stomatal opening is
(a) Red
(b) Blue
(c) Green
(d) Yellow

Answer

Answer: (b)

6. Diffusion of water through selectively permeable membrane is
(a) osmosis
(b) imbibition
(c) translocation
(d) diffusion

Answer

Answer: (a)

7. Water is forcefully pushed beyond endodermis of the root through the process of
(a) diffusion
(b) transmembrane transport
(c) symplast pathway
(d) apoplast pathway

Answer

Answer: (b)

8. Transpiration is a phenomena pertaining to
(a) Activated transport
(b) Diffusion
(c) Osmosis
(d) Facilitated diffusion

Answer

Answer: (b)

9. When placed in water, raisins swell up as a result of
(a) Adsorption
(b) Plasmolysis
(c) Endosmosis
(d) Diffusion

Answer

Answer: (d)

10. A bottle filled with previously moistened mustard seeds and water was screw-capped tightly and placed in a corner. After 30 minutes, it suddenly blew up. This is the process involved
(a) DPD
(b) Osmosis
(c) Imbibition
(d) Diffusion

Answer

Answer: (c)

300+ TOP MCQs on Lac Operon and Answers

MCQs on Lac Operon :

1. Lac operon is an example of
(a) only positive regulation
(b) only negative regulation
(c) both positive and negative regulation
(d) sometimes positive sometimes negative

Answer

Answer: (c)

2. In the presence of lactose, how long does it take for the lac operon to be expressed?
(a) when lactose equals glucose concentration
(b) when glucose is more than lactose concentration
(c) as long as lactose is more than glucose concentration
(d) as long as lactose is more than galactose concentration

Answer

Answer: (c)

3. Which of these acts as an inducer of the lac operon?
(a) Allolactose
(b) Lactose
(c) Galactose
(d) Glucose

Answer

Answer: (a)

4. The sequence of the structural genes in the lac operon is
(a) lacA-lacZ-lacY
(b) lacZ-lacY-lacA
(c) lacZ-lacA-lacY
(d) lacA-lacY-lacZ

Answer

Answer: (b)

5. Regulation of the lac operon can be envisioned as regulation of enzyme synthesis by its
(a) lactose
(b) substrate
(c) carbohydrates
(d) all of the above

Answer

Answer: (d)

6. Lac Operon will be turned on when
(a) Lactose is less than glucose
(b) Lactose is less in the medium
(c) Lactose in more than glucose
(d) Glucose is enough in the medium

Answer

Answer: (c)

7. This will be prevented if the activator fastens to the repressor
(a) Transcription
(b) Binding of the RNA polymerase to the promoter
(c) Binding of the repressor to the operator
(d) Binding of the repressor to the promoter

Answer

Answer: (c)

8. In Lac-operon, the gene product of LacA gene is
(a) Beta-galactoside permease
(b) Beta-galactoside transacetylase
(c) Beta-galactosidase
(d) Beta-galactoside isomerase

Answer

Answer: (b)

9. This condition in lac operon facilitates the condition of lac genes being transcribed at high levels
(a) low glucose, high lactose
(b) low glucose, low lactose
(c) high glucose, high lactose
(d) high glucose, low lactose

Answer

Answer: (a)

10. The correct option regarding the lac operon in E.coli from the following is
(a) Lac operon is switched on in the absence of lactose
(b) Lac repressor binds to the lac promoter
(c) β-galactosidase is the only enzyme produced in large quantities when lac operon is turned on
(d) lac operon messenger RNA is a polycistronic mRNA

Answer

Answer: (d)

300+ TOP MCQs on Nostoc and Answers

MCQs on Nostoc :

1. Find the correct statement
(a) Paramecium, Penicillium and Plasmodium belong to the same kingdom
(b) Nostoc and Anabaena come under Protista
(c) lichen is a symbiotic association of an alga and Protozoan
(d) Yeast is a fungus and is used in bread and beer production

Answer

Answer: (d)

2. Cyanobacteria are
(a) oxygenic without nitrogenase
(b) non-oxygenic without nitrogenase
(c) oxygenic with nitrogenase
(d) non-oxygenic with nitrogenase

Answer

Answer: (c)

3. Blue-green algae are included in
(a) Prokaryotes
(b) Protista
(c) Fungi
(d) Bryophytes

Answer

Answer: (a)

4. An organism that forms a symbiotic association with Anthoceros
(a) Spirogyra
(b) Nostoc
(c) Ulothrix
(d) All of the above

Answer

Answer: (b)

5. Which of the following structure contains a polar nodule on both ends
(a) heterocyst
(b) hormogonia
(c) akinetes
(d) None of the above

Answer

Answer: (a)

6. Nostoc form
(a) compound colony
(b) simple colony
(c) both (a) and (b)
(d) None of these

Answer

Answer: (c)

7. Which of the angiosperm contains Nostoc as an endophyte?
(a) Gunnera manicata
(b) Arachis hypogea
(c) Melia indica
(d) None of the above

Answer

Answer: (a)

8. Coloured portion of the nostoc cell is
(a) genophore
(b) inner centroplasm
(c) outer chromoplasm
(d) central body

Answer

Answer: (c)

9. Heterocyst of Nostoc are
(a) intercalary
(b) terminal
(c) both terminal and intercalary
(d) none

Answer

Answer: (a)

10. Sexual reproduction is absent in
(a) Volvox
(b) Nostoc
(c) Aspergillus
(d) Ulothrix

Answer

Answer: (b)

300+ TOP MCQs on Apomixis and Answers

MCQs on Apomixis :

1. In many laboratories, active research is on to comprehend the genetics of apomixis
(a) Apomixis generates genetically different individuals
(b) Apomixis is the method to produce seeds without fertilization
(c) Hybrid plants are directly formed by apomixis
(d) Transfer of apomictic genes into hybrid varieties that shall prevent hybrid vigour loss over the years

Answer

Answer: (d)

2. Apomixis is a form of
(a) Vernalization
(b) Parthenogenesis
(c) Parthenocarpy
(d) None of the above

Answer

Answer: (b)

3. Geitonogamy and autogamy both are prevented in which one of these?
(a) Cucumber
(b) Maize
(c) Castor
(d) Papaya

Answer

Answer: (d)

4. In plants, apomixis pertains to plant development
(a) from root cuttings
(b) from cuttings of stem
(c) without the gametes having to fuse
(d) fusion of gametes

Answer

Answer: (c)

5. The reason why hybrid seeds have to be produced every year is
(a) hybrid seed industry tends to increase the cost of seeds
(b) hybrid plants turn sterile in coming years
(c) show more heterosis in coming years
(d) hybrid vigour is not maintained in more than one generation as segregation of genes is initiated in the second generation

Answer

Answer: (d)

6. In adventive embryony, a type of apomixis, the embryo develops directly from the
(a) Zygote
(b) accessory embryo sacs in the ovule
(c) antipodals or synergids in an embryo sac
(d) integuments or nucleus

Answer

Answer: (d)

7. Megasporium is equivalent to
(a) ovule
(b) embryo sac
(c) fruit
(d) Nucleus

Answer

Answer: (a)

8. One of these statements about apomixis is incorrect
(a) formation of seeds without fertilization
(b) Meiotic division and fertilization of gametes takes place to form a zygote
(c) Seeds are genetically similar
(d) None of these

Answer

Answer: (b)

9. This about apomixis is true:
(a) There is no fertilization involved in both apomixis and parthenocarpy
(b) Apomixis produces genetically identical mother cells
(c) Apomixis is observed in angiosperms and gymnosperms
(d) All of the above

Answer

Answer: (d)

10. The difference between perisperm and endosperm is that perisperm:
(a) has reserve food
(b) forms by fusion of the secondary nucleus with several sperms
(c) is a diploid tissue
(d) is a haploid tissue

Answer

Answer: (c)