List of top Biology Questions asked in NEET (UG)

Given below are two statements: 

Statement I: Gause’s ‘Competitive Exclusion Principle’ states that two closely related species competing for the same resources cannot co-exist indefinitely and competitively inferior one will be eliminated eventually. 
Statement II: In general, carnivores are more adversely affected by competition than herbivores. 

In the light of the above statements, choose the correct answer from the options given below:

Which one of the following is NOT an advantage of inbreeding?

In tissue culture experiments, leaf mesophyll cells are put in a culture medium to form callus. This phenomenon may be called as

Given below are two statements: One labelled as Assertion A and the other labelled as Reason R:
Assertion A: The first stage of gametophyte in the life cycle of moss is protonema stage.
Reason R: Protonema develops directly from spores produced in capsule.
In the light of the above statements, choose the most appropriate answer from the options given below:
Main steps in the formation of Recombinant DNA are given below. Arrange these steps in a correct sequence.
A. Insertion of recombinant DNA into the host cell
B. Cutting of DNA at specific location by restriction enzyme
C. Isolation of desired DNA fragment
D. Amplification of gene of interest using PCR
Choose the correct answer from the options given below:
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: ATP is used at two steps in glycolysis. 
Reason R: First ATP is used in converting glucose into glucose-6-phosphate and second ATP is used in conversion of fructose-6-phosphate into fructose-1-6-diphosphate.
In the light of the above statements, choose the correct answer from the options given below:
Match List I with List II:
 

List I

 

List II 

A.Oxidative decarboxylationI.Citrate synthase
B.Glycolysis II.Pyruvate dehydrogenase
C.Oxidative phosphorylationIII.Electron transport system
D.Tricarboxylic acid cycleIV.EMP pathway
Choose the correct answer from the options given below:

Given below are two statements:
Statement I: Ligaments are dense irregular tissue.
Statement II: Cartilage is dense regular tissue.
In the light of the above statements, choose the correct answer from the options given below:

Match List I with List II. 

 

List I

 

List II

AMast cellsICiliated epithelium
BInner surfaceIIAreolar connective tissue Of bronchiole
CBloodIIICuboidal epithelium
DTubular parts IVSpecialised connective tissue of nephron

Choose the correct answer from the options give below:

Given below are two statements: One labelled as Assertion A and the other labelled as Reason R:
Assertion A: In gymnosperms the pollen grains are released from the microsporangium and carried by air currents.
Reason R: Air currents carry the pollen grains to the mouth of the archegonia where the male gametes are discharged and pollen tube is not formed.
In the light of the above statements, choose the correct answer from the options given below:
Match List I with List II. 
 

List I

 

List II

ALogistic growthIUnlimited resource availability condition 
BExponential growth IILimited resource availability condition
CExpanding age pyramid IIIThe percent individuals of pre-reproductive age is largest followed by reproductive and post reproductive age groups
DStable age pyramidIVThe percent individuals of pre-reproductives and reproductive age group are same
Choose the correct answer from the options given below:

Match List I with List II: 

 List I (Interaction) List II (Species A and B) 
A.MutualismI.+(A), O(B)
B.CommensalismII.–(A), O(B)
C.AmensalismIII.+(A), –(B)
D.ParasitismIV+(A), +(B)

Choose the correct answer from the options given below:

Match List I with List II. 

 

List I  (Interacting species)

 

 List II (Name of interaction)

ALeopard and a Lion in a forest/grassland ICompetition 
BA Cuckoo laying egg in a Crow’s nest IIBrood parasitism 
CFungi and root of a higher plant in MycorrhizaeIIIMutualism
DA cattle egret and a Cattle in a fieldIV Commensalism 

Choose the correct answer from the options given below

How many different proteins does the ribosome consist of?

Once the undigested and unabsorbed substances enter the caecum, their backflow is prevented by
Given below are two statements: one is labelled as Assertion A and other is labelled as Reason R.
Assertion A: Amniocentesis for sex determination is one of the strategies of Reproductive and Child Health Care Programme.
Reason R: Ban on amniocentesis checks increasing menace of female foeticide.
In the light of the above statements, choose the correct answer from the options given below

Which of the following statements are correct?

  1. An excessive loss of body fluid from the body switches off osmoreceptors.
  2. ADH facilitates water reabsorption to prevent diuresis.
  3. ANF causes vasodilation.
  4. ADH causes increase in blood pressure.
  5. ADH is responsible for decrease in GFR.

Choose the correct answer from the options given below:

Which one of the following common sexually transmitted diseases is completely curable when detected early and treated properly?
In cockroach, excretion is brought about by
A. Phallic gland
B. Uricose gland
C. Nephrocytes
D. Fat body
E. Collaterial glands
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: A flower is defined as modified shoot wherein the shoot apical meristem changes to floral meristem.
Reason R: Internode of the shoot gets condensed to produce different floral appendages laterally at successive node instead of leaves.
In the light of the above statements, choose the correct answer from the options given below:
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: Late wood has fewer xylary elements with narrow vessels.
Reason R: Cambium is less active in winters.
In the light of the above statements, choose the correct answer from the options given below:

Identify the correct statements: 

A. Lenticels are the lens-shaped openings permitting the exchange of gases. 
B. Bark formed early in the season is called hard bark. 
C. Bark is a technical term that refers to all tissues exterior to vascular cambium. 
D. Bark refers to periderm and secondary phloem. 
E. Phellogen is single-layered in thickness. 

Choose the correct answer from the options given below:

Which of the following are NOT under the control of thyroid hormone?

  1. Maintenance of water and electrolyte balance
  2. Regulation of basal metabolic rate
  3. Normal rhythm of sleep-wake cycle
  4. Development of immune system
  5. Support the process of RBCs formation

Choose the correct answer from the options given below:

The unique mammalian characteristics are:

Match List I with List II. 

 

List I

 

 List II

ACCKIKidney
BGIPIIHeart 
CANFIIIGastric gland
DADHIVPancreas

List I List II A. CCK I. Kidney B. GIP II. Heart C. ANF III. Gastric gland D. ADH IV. Pancreas Choose the correct answer from the options given below: