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 Food Adulteration Multiple Choice Questions

MCQs on Food Adulteration :

1. This method dehydrates microbial cells by plasmolysis thereby causing them to die
(a) Heating
(b) Smoking
(c) Pasteurization
(d) Sugaring

Answer

Answer: (d)

2. The full form of PFA is
(a) Prevention of Food Act
(b) Protection of Food Act
(c) Prevention of Food Adulteration
(d) None of the above is correct

Answer

Answer: (c)

3. The preservation of food through ‘ Cold sterilization’ involves
(a) Dehydration
(b) Lyophilization
(c) Refrigeration
(d) Radiation

Answer

Answer: (d)

4. This is an example of biological hazard
(a) Cleaners
(b) Antibiotics
(c) Salmonella
(d) Dirt

Answer

Answer: (c)

5. Under the PFA Act, when is the food said to be adulterated
(a) if any ingredient is injurious to health
(b) if it is obtained from a diseased animal
(c) if spices are sold without their essence
(d) all of these

Answer

Answer: (d)

6. This statement about Potassium Bromate is/are true

1. Potassium Bromate is a category 2B carcinogen
2. Potassium Bromate increases dough strength, leads to higher rising and uniform finish to baked products
3. Food Safety and Standards Authority of India (FSSAI) allows them upto 50 parts per million

(a) 1,2
(b) 1,3
(c) 2,3
(d) All of these

Answer

Answer: (d)

7. HACCP stands for
(a) Physical, Chemical and Biological hazards
(b) Accurately monitoring food hygiene hazards
(c) Identifying CCPs, inclusive of procedure, location and process
(d) A systematic analysis of all steps and regular monitoring of control points

Answer

Answer: (d)

8. Pasteurization is the process of healing milk
(a) above 1500C
(b) above 1210C
(c) above boiling point
(d) below boiling point

Answer

Answer: (d)

9. This reason shows the impact of adulteration on the economy
(a) Adulteration -> People falling sick -> court cases
(b) Adulteration -> People falling sick ->spending money on treatment
(c) Adulteration -> People falling sick ->spending money on treatment or court cases
(d) None of these

Answer

Answer: (c)

10. This is an adulterant
(a) Pesticides
(b) Urea
(c) Iron filings in tea
(d) All of the above

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 Yeast and Albugo Multiple Choice Questions

MCQs on Yeast and Albugo :

1. Yeast produces an enzyme complex which is responsible for fermentation. Which is the enzyme complex?
(a) Zymase
(b) Dehydrogenase
(c) Aldolase
(d) Invertase

Answer

Answer: (a)

2. In yeast, the sexual reproduction is by conjugation. After fusion, the zygotic nucleus divides meiotically and forms haploid spores. The unicellular structure with haploid spores is
(a) Gametangium
(b) Zoosporangium
(c) Sporangium
(d) Ascus

Answer

Answer: (a)

3. The antibiotic obtained from the yeast is
(a) Saccharin
(b) Ephedrine
(c) Polymixin
(d) Campestrin

Answer

Answer: (b)

4. In manufacture of bread, it becomes porous due to the liberation of CO₂ by the action of
(a) Yeast
(b) Virus
(c) Protozoans
(d) Bacteria

Answer

Answer: (a)

5. The food reserve in Albugo usually is
(a) Fat
(b) Protein granules
(c) Glycogen
(d) Volutin granules

Answer

Answer: (c)

6. This statement on Albugo is incorrect
(a) Non-flagellated female gametes
(b) Biflagellated zoospores
(c) Biflagellated male gametes
(d) All of these

Answer

Answer: (c)

7. The species causing white rust of cruciferae has a botanical name, it is
(a) Pythium debaryanum
(b) Peronospora parasitica
(c) Albugo candida
(d) Puccinia graminis

Answer

Answer: (c)

8. Yeast is not included in protozoans but in fungi because
(a) it has eukaryotic organization
(b) cell wall is made up of cellulose and reserve food material as starch
(c) Some fungal hyphae grow in such a way that they give the appearance of pseudomycelium
(d) it has no chlorophyll

Answer

Answer: (c)

9. This is used in the preparation of alcohol
(a) Saccharomyces
(b) Acetobacter
(c) Lactobacillus
(d) Penicillium

Answer

Answer: (a)

10. Fungus without mycelium is
(a) Agaricus
(b) Albugo
(c) Puccinia
(d) Saccharomyces

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 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)

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 Apoptosis Multiple Choice Questions

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)

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 Diffusion Multiple Choice Questions

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)

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 Lac Operon Multiple Choice Questions

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)