List of top Biology Questions asked in NEET (UG)

Which of the following is/are present in female cockroach?
A. Collateral gland
B. Mushroom gland
C. Spermatheca
D. Anal style
E. Phallic gland
Choose the most appropriate answer from the options given below:

Arrange the following parts in human Mammary gland, traversing the route of milk ejection.
A. Mammary duct
B. Lactiferous duct
C. Mammary alveolus
D. Ampulla
E. Mammary tubule
Choose the correct answer from the options given below:

Which of the following are correct about EcoR1?
A. Cut the DNA with blunt end
B. Cut the DNA with sticky end
C. Recognise a specific palindromic sequence
D. Cut the DNA between the base G and A when encounters the DNA sequence ‘GAATTC’
E. Exonuclease
Choose the correct answer from the options given below:

Which of the following pairs is an incorrect match?

Given below are two statements:
Statement I: Antibiotics are chemicals produced by microbes that kill other microbes.
Statement II: Antibodies are chemicals formed in body that eliminate microbes.
In the light of the above statements, choose the most appropriate answer from the options given below.

Match List I with List II :

List - I		List – II
A.	Copper releasing IUD	i.	Vaults
B.	Non-medicated IUD	ii.	Multiload 375
C.	Contraceptive barrier	iii.	LNG-20
D.	Hormone releasing IUD	iv.	Lippes loop

Choose the correct answer from the options given below :

Match List I with List II :

List - I		List – II
A.	Streptococcus	i.	Citric acid
B.	Trichoderma polysporum	ii.	Clot buster
C.	Monascus purpureus	iii.	Cyclosporin A
D.	Aspergillus niger	iv.	Statins

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: During menstrual cycle, the ovulation takes place approximately on 14^th day.
Reason R: Rapid secretion of LH in the middle of menstrual cycle induces rupture of Graafian follicle and thereby the release of ovum.
In the light of the above statements, choose the most appropriate answer from the options given below.

Match List I with List II :

List - I		List – II
A.	Lemur	i.	Flying phalanger
B.	Bobcat	ii.	Numbat
C.	Anteater	iii.	Spotted cuscus
D.	Flying squirrels	iv.	Tasmanian tiger cat

Choose the correct answer from the options given below :

Match List I with List II :

List - I		List – II
A.	Primary structure of protein	i.	Human haemoglobin
B.	Secondary structure of protein	ii.	Dispulphide bonds
C.	Tertiary structure of protein	iii.	Polypeptide chain
D.	Quaternary structure of protein	iv.	\(Alpha\ helix\ and\ \beta\ sheet\)

Choose the correct answer from the options given below :

Enzymes that catalyse the removal of groups from substrates by mechanisms other than hydrolysis leaving double bonds, are known as :

Select the restriction endonuclease enzymes whose restriction sites are present for the tetracycline resistance (tet^R) gene in the pBR322 cloning vector

Match List I with List II :

List - I		List – II
A.	Epinephrine	i.	Hyperglycemia
B.	Thyroxine	ii.	Smooth muscle contraction
C.	Oxytocin	iii.	Basal metabolic rate
D.	Glucagon	iv.	Emergency hormone

Choose the correct answer from the options given below :

Which of the following statements is correct about the type of junction and their role in our body?

Match List I with List II :

List - I		List – II
A.	Chondrichthyes	i.	Clarias
B.	Cyclostomata	ii.	Carcharodon
C.	Osteichthyes	iii.	Myxine
D.	Amphibia	iv.	Ichthyophis

Choose the correct answer from the options given below :

Match List I with List II :

List - I		List – II
A.	Chiasmata formation	i.	Pachytene
B.	Crossing over	ii.	Diakinesis
C.	Synaptonemal complex formation	iii.	Diplotene
D.	Terminalisation of chiasmata	iv.	Zygotene

Choose the correct answer from the options given below :

A person with blood group ARh^– can receive the blood transfusion from which of the following types?
A. BRh^–
B. ABRh^– 
C. ORh^– 
D. ARh^– 
E. ARh⁺ 
Choose the correct answer from the options given below :

Following are the steps involved in action of toxin in Bt. Cotton
A. The inactive toxin converted into active form due to alkaline pH of gut of insect.
B. Bacillus thuringiensis produce crystals with toxic insecticidal proteins.
C. The alkaline pH solubilises the crystals.
D. The activated toxin binds to the surface of midgut cells, creates pores and causes death of the insect.
E. The toxin proteins exist as inactive protoxins in bacteria.
Choose the correct sequence of steps from the options given below:

When will the population density increase, under special conditions?
When the number of :

Observe the given figure. Identify the different stages labelled with alphabets by selecting the correct option

The Bt toxin in genetically engineered Bt cotton kills the pest by:

Which one of the following products diffuses out of the chloroplast during photosynthesis?

Recombinant DNA molecule can be created normally by cutting the vector DNA and source DNA respectively with:

Given below are two statements :
Statement I: In the lac operon, the z gene codes for beta-galactosidase which is primarily responsible for the hydrolysis of lactose into galactose and glucose.
Statement II: In addition to lactose, glucose or galactose can also induce lac operon.
In the light of the above statements, choose the correct answer from the options given below :

Consider the pyramid of energy of an ecosystem given below:

If \(T_4\) is equivalent to 1000 J, what is the value at \(T_1\)