300+ REAL TIME NEET Biology Objective Questions & Answers 2023

300+ TOP MCQs on Ecosystem 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 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)

300+ TOP MCQs on Muscular Dystrophy and Answers

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)

300+ TOP MCQs on Lipids and Answers

MCQs on Lipids :

1. This molecule acts as molecular chaperones to assist the folding of proteins
(a) Vitamins
(b) Carbohydrates
(c) Amides
(d) Lipids

Answer

Answer: (d)

2. Which of these is not a lipid?
(a) Fats
(b) Oils
(c) Proteins
(d) Waxes

Answer

Answer: (c)

3. The abundantly distributed enzyme in germinating seeds and adipocytes is
(a) Lipase
(b) Proteases
(c) Cellulase
(d) Nuclease

Answer

Answer: (a)

4. Beta-oxidation of fatty acids occurs in
(a) Peroxisome
(b) Peroxisome and Mitochondria
(c) Mitochondria
(d) Peroxisome, Mitochindria and ER

Answer

Answer: (c)

5. An example of ____________ is Carnauba wax
(a) Soft wax
(b) Liquid wax
(c) Hard wax
(d) Archaebacterial wax

Answer

Answer: (c)

6. In fats, the number of OH groups can be expressed as
(a) Reichert-Meissil number
(b) Polenske number
(c) Iodine number
(d) Acetyl number

Answer

Answer: (d)

7. Rancidity of lipids of lipid-rich foodstuff is because of
(a) Reduction of fatty acids
(b) Hydrogenation of unsaturated fatty acids
(c) Dehydrogenation of saturated fatty acids
(d) Oxidation of fatty acids

Answer

Answer: (d)

8. This is an example of derived lipids
(a) Terpenes
(b) Steroids
(c) Carotenoids
(d) All of the above

Answer

Answer: (d)

9. The degree of unsaturation of lipids can be measured as
(a) Iodine number
(b) Saponification number
(c) Reichert Meissel number
(d) Polenske number

Answer

Answer: (a)

10. The specific gravity of lipid is
(a) 1.5
(b) 1.0
(c) 0.8
(d) 0.2

Answer

Answer: (c)

300+ TOP MCQs on Osmoregulation and Answers

MCQs on Osmoregulation :

1. In Paramoecium, osmoregulation is a function of
(a) cytostome
(b) contractile vacuole
(c) cytopyge
(d) trichocysts

Answer

Answer: (b)

2. Osmoregulators carry out excretion of salt through
(a) gills
(b) fins
(c) scales
(d) bladder

Answer

Answer: (a)

3. Without restoration, if excess water passes out from the tissues of kidney, the cells would
(a) shrivel and die
(b) burst open and die
(c) not get affected at all
(d) take water from plasma

Answer

Answer: (c)

4. This is used as an osmolyte in humans to increase medullary interstitial osmolality during concentration of urine
(a) Urea
(b) TMAO
(c) (a) and (b) both
(d) Uric acid

Answer

Answer: (a)

5. A person on a long hunger strike, surviving only on water will have
(a) less amino acids in his urine
(b) more sodium in hir urine
(c) less urea in his urine
(d) more glucose in his blood

Answer

Answer: (c)

6. Mechanism of regulation, typically between entities and its environment of solutes and the loss and gain of water is known as
(a) Homeostasis
(b) Thermoregulation
(c) Hemostasis
(d) Osmoregulation

Answer

Answer: (d)

7. Most of the marine invertebrates are
(a) Osmoregulators
(b) Osmoconformers
(c) both depend on sea water concentration
(d) None of the above

Answer

Answer: (b)

8. Kidney matrix retains some quantity of urea to maintain
(a) metabolism
(b) micturition
(c) desired osmolarity
(d) balance of the body

Answer

Answer: (c)

9. This is not a primary function of protonephridia
(a) excretion
(b) osmoregulation
(c) fluid volume regulation
(d) ionic volume regulation

Answer

Answer: (a)

10.This is both osmoregulator and a nitrogenous product
(a) Uric acid
(b) Urea
(c) NH₃
(d) All of the above

Answer

Answer: (b)

300+ TOP MCQs on Energy Requirement and Answers

MCQs on Energy Requirement :

1. The energy balance in nutrition refers to the
(a) equilibrium between energy intake and energy expenditure
(b) equilibrium of rate of reduction
(c) equation of rate of oxidation
(d) amount of starch in take

Answer

Answer: (a)

2. This provides the greatest energy value per gram of nutrient
(a) protein
(b) fat
(c) carbohydrate
(d) water

Answer

Answer: (b)

3. The following cooking processes does not rely on coagulation taking place
(a) making yoghurt
(b) boiling an egg
(c) whipping cream
(d) frying chips

Answer

Answer: (d)

4. The everyday dietary requirement of an average adult active moderately is approximately
(a) 1000 kcal
(b) 2500 kcal
(c) 4000 kcal
(d) 8000 kcal

Answer

Answer: (b)

5. Caloric values for proteins, carbohydrates and fats are
(a) 80 cal, 40 cal, and 100 cal respectively
(b) 5.65 cal, 4.1 cal, and 9.45 cal respectively
(c) 100 cal, 5.68 cal, and 30 cal respectively
(d) 4.68 cal, 50 cal and 80 cal respectively

Answer

Answer: (b)

6. Among the energy values of nutrients, 9.3 calories is that of
(a) Carbohydrate
(b) Proteins
(c) Vitamins
(d) Fats

Answer

Answer: (d)

7. What is the sequence in which organic compounds are used by the body during prolonged fasting
(a) Carbohydrates first, proteins and then lipids
(b) Carbohydrates first, proteins and then lipids
(c) Proteins first, lipids and then carbohydrates
(d) Fats first, carbohydrates and then proteins

Answer

Answer: (b)

8. An approximate of how much protein does an average adult male require each day?
(a) 240g
(b) 24g
(c) 120g
(d) 72g

Answer

Answer: (d)

9. Mammals can drink water and also derive it from
(a) conversion of oxyhaemoglobin to haemoglobin
(b) breakdown of glycogen into glucose
(c) glucose oxidation
(d) saliva secretion

Answer

Answer: (c)

10. Cooking starch in moist conditions may
(a) oxidize it
(b) caramelize it
(c) gelatinise it
(d) coagulate it

Answer

Answer: (a)

300+ TOP MCQs on Pancreas and Answers

MCQs on Pancreas :

1. Inhibition of gastric secretions is brought about by
(a) GIP
(b) Cholecystokinin
(c) Gastrin
(d) Pancreozymin

Answer

Answer: (a)

2. One of the constituents of the pancreatic juice while poured into the duodenum in humans is
(a) trypsin
(b) enterokinase
(c) trypsinogen
(d) chymotrypsin

Answer

Answer: (c)

3. Pancreatitis can be produced by the following drug
(a) Ciprofloxacin
(b) Nalidixic acid
(c) Colchicine
(d) L-Asparaginase

Answer

Answer: (d)

4. Gasless abdomen in X-ray is a sign of
(a) Ulcerative colitis
(b) Acute pancreatitis
(c) Intussusception
(d) Necrotizing enterocolitis

Answer

Answer: (b)

5. This is a major product of chief cells
(a) Mucus
(b) Vitamin B12
(c) Pepsinogen
(d) HCl

Answer

Answer: (c)

6. The islets of Langerhans are found in
(a) Stomach
(b) Alimentary canal
(c) Pancreas
(d) Liver

Answer

Answer: (c)

7. Secretion of pancreatic juice is triggered by
(a) secretin
(b) enterogastrone
(c) gastrin
(d) enterokinase

Answer

Answer: (a)

8. This is a common passage for bile and pancreatic juice
(a) stomach
(b) ampulla
(c) duct of oddi
(d) duct of wirsung

Answer

Answer: (b)

9. Pancreas is not
(a) Elongated organ
(b) Compound
(c) Exocrine portion secretes pancreatic juice
(d) Located above duodenum

Answer

Answer: (d)

10. This is most diagnostic investigation for acute pancreatitis
(a) Serum LDH
(b) Serum amylase
(c) Serum Lipase
(d) Serum P-isoamylase

Answer

Answer: (c)