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 Infertility Multiple Choice Questions

MCQs on Infertility :

1. This is a major reason for infertility in women
(a) Anovulation
(b) Weight
(c) Age
(d) All of these

Answer

Answer: (d)

2. Boosting the intake of _________ can help women trying to conceive
(a) Potassium
(b) Folic acid
(c) Lycopene
(d) Nickel

Answer

Answer: (b)

3. Nerve supply of ovary is through
(a) Sacral fibers
(b) Pudendal nerve
(c) Branches of renal and aortic plexus
(d) none of the above

Answer

Answer: (c)

4. Menstrual phase bleeding is due to
(a) necrosin
(b) fibrinolysis
(c) menotoxin
(d) vasoconstriction and ischaemia

Answer

Answer: (d)

5. Fertility in women is impaired by
(a) Hernia
(b) High blood pressure
(c) Obesity
(d) Gallstones

Answer

Answer: (c)

6. Infertility is when a couple fails to conceive after
(a) 4 years of unprotected sex
(b) 3years of unprotected sex
(c) 2 years of unprotected sex
(d) 1 years of unprotected sex

Answer

Answer: (d)

7. Procedures used to treat infertility are
(a) ICSI – Intracytoplasmic Sperm Injection
(b) IVF – In Vitro Fertilization
(c) IUI – Intrauterine insemination
(d) All of these

Answer

Answer: (d)

8. Right ovarian artery arises from
(a) Uterine artery
(b) Aorta
(c) Renal artery
(d) Common iliac artery

Answer

Answer: (b)

9. This condition impair infertility
(a) PCO
(b) Fibroids
(c) Endometriosis
(d) All of these

Answer

Answer: (d)

10. In women, this sexually transmitted disease can result in infertility
(a) Human papillomavirus (HPV)
(b) Pelvic inflammatory disease
(c) Genital herpes
(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 Mycoplasma Multiple Choice Questions

MCQs on Mycoplasma :

1. Mycoplasma is
(a) eukaryotic and unicellular
(b) prokaryotic and unicellular
(c) prokaryotic and multicellular
(d) eukaryotic and multicellular

Answer

Answer: (b)

2. The “witches broom” of legumes is caused by a
(a) fungus
(b) bacterium
(c) mycoplasma
(d) virus

Answer

Answer: (c)

3. This species of mycoplasma causes human sterility
(a) T.mycoplasma
(b) M.fermentans
(c) M.hominis
(d) all of the above

Answer

Answer: (d)

4. In mycoplasma, the elementary cell body performs the function of
(a) respiration
(b) reproduction
(c) excretion
(d) metabolism

details>

Answer

Answer: (b)

5. This is called “Jockers of microbiological park”
(a) nostoc
(b) mycoplasma
(c) bacteria
(d) none of these

Answer

Answer: (b)

6. These are osmotically inactive
(a) nostoc
(b) mycoplasma
(c) bacteria
(d) all of these

Answer

Answer: (b)

7. Vancomycin and Penicillin do not affect the mycoplasma as
(a) there is no Golgi body
(b) there are no mitochondria
(c) there is no nucleus
(d) there is no cell wall

Answer

Answer: (d)

8. This is a bacteria without cell wall
(a) cyanobacteria
(b) mycoplasma
(c) viroid
(d) virus

Answer

Answer: (b)

9. Little leaf of brinjal is caused by
(a) algae
(b) fungus
(c) mycoplasma
(d) virus

Answer

Answer: (c)

10. This is the smallest organism capable of autonomous growth and reproduction
(a) mycoplasma
(b) viroid
(c) virus
(d) none of these

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 Kranz Anatomy Multiple Choice Questions

MCQs on Kranz Anatomy :

1. Who discovered the C₄ pathway?
(a) Melvin Kelvin
(b) Hatch and Slack
(c) Rudolph Markus
(d) Robert Brown

Answer

Answer: (b)

2. Which of the following is a C₄ plant?

(a) Wheat
(b) Cactus
(c) Rice
(d) Sugarcane

Answer

Answer: (d)

3. C₄ pathway takes place in
(a) Xylem
(b) Bundle sheath cells
(c) Phloem
(d) Mesophyll cells

Answer

Answer: (d)

4. Which of the following pathways of carbon fixation has phosphoenol pyruvate as a primary CO₂ acceptor?
(a) C₃ plant
(b) C₄ plants
(c) both (a) and (b)
(d) C₂ plants

Answer

Answer: (b)

5. Which of the following is true about bundle sheath cells present in the leaves having Kranz anatomy?
(a) they have thin walls with many intercellular spaces and chloroplasts are absent
(b) they have thin walls with no intercellular spaces and many chloroplasts
(c) they have thick walls with many intercellular spaces and few chloroplasts
(d) they have thick walls with no intercellular spaces and many chloroplasts

Answer

Answer: (d)

6. C₄ pathway is a more efficient photosynthetic pathway than C₃, because of
(a) lower photorespiration rate
(b) cells contain more chloroplasts in leaves
(c) larger leaf area
(d) spore formation

Answer

Answer: (a)

7. In leaves with Kranz anatomy, formation of malic acid during CO₂ fixation occurs in
(a) epidermis
(b) phloem
(c) mesophyll
(d) bundle sheath

Answer

Answer: (c)

8. In C₄ plants, Calvin cycle occurs in
(a) chloroplasts present in the grana of bundle sheath
(b) chloroplasts present in the grana of mesophyll
(c) chloroplasts present in the stroma of mesophyll
(d) chloroplasts present in the stroma of bundle sheath

Answer

Answer: (d)

9. The difference between C₃ and C₄ pathway is
(a) photorespiration
(b) Calvin cycle
(c) respiration
(d) glycolysis

Answer

Answer: (a)

10. The final product of C₄ pathway is
(a) Malate
(b) Oxalate
(c) Acetate
(d) Aspartate

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 Krebs Cycle Multiple Choice Questions

MCQs on Krebs Cycle :

1. Product of Krebs cycle essential for oxidative phosphorylation is _______
(a) NADPH and ATP
(b) Acetyl CoA
(c) CO₂ and oxaloacetate
(d) NADH and FADH₂

Answer

Answer: (d)

2. A single molecule of glucose generates _________ molecules of acetyl CoA, which enters the Krebs cycle.
(a) 4
(b) 3
(c) 2
(d) 1

Answer

Answer: (d)

3. ___________ accepts hydrogen from malate
(a) FAD
(b) NAD
(c) NADP
(d) FMN

Answer

Answer: (b)

4. Which of the intermediate of the Kreb’s cycle is utilised in the formation of amino acids?
(a) Citric acid
(b) Malic acid
(c) Isocitric acid
(d) 𝛼-ketoglutaric acid

Answer

Answer: (d)

5. Krebs cycle occurs in aerobic respiration due to
(a) Electron transport chain requires aerobic conditions to operate
(b) Oxygen is a reactant
(c) Oxygen has a catalytic function
(d) All of the above

Answer

Answer: (a)

6. Acetyl CoA is formed from pyruvate by__________ reaction
(a) Dehydration
(b) Reduction
(c) Oxidative decarboxylation
(d) Dephosphorylation

Answer

Answer: (c)

7. Which of the following is not formed during the Krebs cycle?
(a) Lactate
(b) Isocitrate
(c) Succinate
(d) Both (a) and (b)

Answer

Answer: (a)

8. The entry of pyruvate into the TCA cycle is inhibited by the presence of a high cellular concentration of
(a) Pyruvate
(b) NADH
(c) Coenzyme A
(d) AMP

Answer

Answer: (b)

9. ATP synthesis is powered by
(a) Coenzyme motive force
(b) cAMP
(c) proton gradient
(d) GTP hydrolysis

Answer

Answer: (c)

10. FAD is reduced in which of the reaction of the Kreb’s cycle?
(a) Isocitrate to oxaloacetate
(b) Succinyl CoA to Succinate
(c) Fumarate to malate
(d) Succinate to fumarate

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 Enzyme Multiple Choice Questions

MCQs on Enzyme :

1. The nature of an enzyme is
(a) Lipid
(b) Vitamin
(c) Carbohydrate
(d) Protein

Answer

Answer: (d)

2. In alcoholism, this enzyme is elevated
(a) acid phosphatase
(b) hepatitis
(c) serum glutamate pyruvate transaminase
(d) glutamyl transpeptidase

Answer

Answer: (d)

3. With regards to enzyme action, this statement is incorrect
(a) Malonate is a competitive inhibitor of succinic dehydrogenase
(b) the substrate binds with the enzyme at its active site
(c) the non-competitve inhibitor binds the enzyme at a site distinct from that binding the substrate
(d) addition of a lot of succinates does not reverse the inhibition of succinic dehydrogenase by malonate

Answer

Answer: (d)

4. What is the count of genes that determine the synthesis of one enzyme?
(a) One
(b) Four
(c) Eight
(d) Sixteen

Answer

Answer: (a)

5. This enzyme was first isolated and purified in the form of crystals
(a) Urease
(b) pepsin
(c) Amylase
(d) Ribonuclease

Answer

Answer: (a)

6. Macromolecule chitin is
(a) a simple polysaccharide
(b) sulphur containing polysaccharide
(c) phosphorous containing polysaccharide
(d) nitrogen containing polysaccharide

Answer

Answer: (d)

7. Enzyme-driven metabolic pathways can be made more efficient by
(a) grouping enzymes into multienzyme free-floating complexes
(b) concentrating enzymes with specific cellular compartments
(c) fixing enzymes into membranes so they are adjacent to each other
(d) all of these

Answer

Answer: (d)

8. Tryptophan synthetase of E.coli, a typical bifunctional oligomeric enzyme consists of
(a) a protein A and one subunit A
(b) a protein designated A
(c) two proteins designated A and B
(d) a protein designated B

Answer

Answer: (c)

9. This statement about enzymes is true
(a) enzymes accelerate reactions by lowering the activation energy
(b) enzymes are proteins whose three-dimensional form is key to their function
(c) enzymes do not alter the overall change in free energy for a reaction
(d) all of these

Answer

Answer: (d)

10. The enzyme COX-1 is vital for human health in this way:
(a) it is a chemical derivative of aspirin
(b) catalyzes the hormone-production which maintains the stomach lining
(c) critical for the biosynthesis of DNA
(d) helps in the transportation of carbon dioxide in the blood

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 Thyroid Gland Multiple Choice Questions

MCQs on Thyroid Gland :

1. The main hormone secreted by the Thyroid gland
(a) T4
(b) T3
(c) (a) and (b) Both
(d) TSH

Answer

Answer: (c)

2. Iodine deficiency can cause
(a) Goitre
(b) Thyroid cancer
(c) Solitary thyroid nodules
(d) Thyroiditis

Answer

Answer: (a)

3. Grave’s disease or Basedow’s disease is due to
(a) Hyperactivity of adrenal cortex
(b) Hypoactivity of the thyroid gland
(c) Hyperactivity of thyroid gland
(d) Hypoactivity of islets of Langerhans

Answer

Answer: (c)

4. The four small glands in the thyroid gland are known as
(a) Adrenal gland
(b) Pineal gland
(c) Parathyroid gland
(d) Endocrine and exocrine gland

Answer

Answer: (c)

5. Sometimes, the thyroid symptoms are mistaken for which condition?
(a) Menopause
(b) Posttraumatic stress
(c) Pregnancy
(d) Crohn’s disease

Answer

Answer: (a)

6. Medications for hypothyroidism include treatment that:
(a) Replaces insulin
(b) Replaces ADH
(c) Replaces TH
(d) Replaces surfactant

Answer

Answer: (c)

7. Which of these diseases is not related to thyroid glands?
(a) Cretinism
(b) Myxoedema
(c) Goitre
(d) Acromegaly

Answer

Answer: (d)

8. In chronically deficient patients, this abnormality is directly related to the enlargement of the thyroid gland
(a) Impaired conversion of T3 and T4
(b) Reduced activity of thyroperoxidase
(c) Elevated levels of TSH
(d) An antibody that binds to the TSH receptor in the thyroid gland

Answer

Answer: (c)

9. ____________ encloses thyroid, responsible for its movement during swallowing
(a) Prevertebral fascia
(b) Pretracheal fascia
(c) Investing layer of the deep cervical fascia
(d) Superficial fascia

Answer

Answer: (b)

10. This condition of chronic inflammation of the thyroid leading to under-activity is
(a) Thyroiditis
(b) Goitre
(c) Hypothyroidism
(d) Hyperthyroidism

Answer

Answer: (a)