NEET 2022 Phase 1

"Girdling Experiment" was performed by Plant Physiologists to identify the plant tissue through which:

Read the following statements about the vascular bundles:
(a) In roots, xylem and phloem in a vascular bundle are arranged in an alternate manner along the different radii.
(b) Conjoint closed vascular bundles do not possess cambium
(c) In ...

In old trees the greater part of secondary xylem is dark brown and resistant to insect attack due to :
(a) secretion of secondary metabolities and their deposition in the lumen of vessels.
(b) deposition of organic compounds like tannins an...

what is the role of large bundle sheath cells found around the vascular bundles in C4 plants?

The anatomy of springwood shows some peculiar features. Identify the correct set of statements about springwood.
(a) It is also called as the earlywood
(b) In spring season cambium produces xylem elements with narrow vessels
(c) It is light...

Exoskeleton of arthropods is composed of:

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : All vertebrates are chordates but all chordates are not vertebrates.
Reason (R) : Notochord is replaced by vertebral ...

Which of the following is not a method of ex situ conservation?

Habitat loss and fragmentation, over exploitation, alien species invasion and co-extinction are causes for :

In-situ conservation refers to :

Given below are two statements:
Statement I : Mycoplasma can pass through less than 1 micron filter size.
Statement II : Mycoplasma are bacteria with cell wall.
In the light of the above statements, choose the most appropriate answer from t...

Which of the following is a correct statement?

Read the following statements on lipids and find out correct set of statements :
(a) Lecithin found in the plasma membrane is a glycolipid
(b) Saturated fatty acids possess one or more c = c bonds
(c) Gingely oil has lower melting point, he...

A dehydration reaction links two glucose molecules to product maltose. If the formula for glucose is C6H12O6 then what is the formula for maltose?

Match List-I with List-II:

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In the following palindromic base sequences of DNA, which one can be cut easily by particular restriction enzyme?

In gene therapy of Adenosine Deaminase (ADA) deficiency, the patient requires periodic infusion of genetically engineered lymphocytes because:

Statements related to human Insulin are given below.
Which statements is/are correct about genetically engineered Insulin?
(a) Pro-hormone insulin contain extra stretch of C-peptide
(b) A-peptide and B-peptide chains of insulin were produce...

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Polymerase chain reaction is used in DNA amplification.
Reason (R) : The ampicillin resistant gene is used as a selec...

Which one of the following statement is not true regarding gel electrophoresis technique?

Given below are two statements:
Statement I : Restriction endonucleases recognise specific sequence to cut DNA known as palindromic nucleotide sequence.
Statement II : Restriction endonucleases cut the DNA strand a little away from the cent...

Which of the following is not a desirable feature of a cloning vector?

Given below are two statements:
Statement I : The coagulum is formed of network of threads called thrombins.
Statement II : Spleen is the graveyard of erythrocytes.
In the light of the above statements, choose the most appropriate answer fr...

Which one of the following statements is correct?

Under normal physiological conditions in human being every 100 ml of oxygenated blood can deliver ____________ ml of O2 to the tissues.

Which of the following is not the function of conducting part of respiratory system?

Which one of the following never occurs during mitotic cell division?

The appearance of recombination nodules on homologous chromosomes during meiosis characterizes:

Match List I with List II.

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Regarding Meiosis, which of the statements is incorrect?

Select the incorrect statement with reference to mitosis :

Which of the following statements with respect to Endoplasmic Reticulum is incorrect?

Which of the following are not the effects of Parathyroid hormone?
(a) Stimulates the process of bone resorption
(b) Decreases Ca2+ level in blood
(c) Reabsorption of Ca2+ by renal tubules
(d) Decreases the absorption of Ca2+ from digested ...

Given below are two statements:
Statement I : Fatty acids and glycerols cannot be absorbed into the blood.
Statement II : Specialized lymphatic capillaries called lacteals carry chylomicrons into lymphatic vessels and ultimately into the bl...

Which of the following functions is not performed by secretions from salivary glands?

Which of the following is present between the adjacent bones of the vertebral column?

Given below are two statements:
Statement I : Decomposition is a process in which the detritus is degraded into simpler substances by microbes.
Statement II : Decomposition is faster if the detritus is rich in lignin and chitin.
In the ligh...

Which one of the following will accelerate phosphorus cycle?

Detritivores breakdown detritus into smaller particles. This process is called :

The device which can remove particulate matter present in the exhaust from a thermal power plant is:

The entire fleet of buses in Delhi were converted to CNG from diesel. In reference to this, which one of the following statements is false?

Given below are two statements:
Statement I : In a scrubber the exhaust from the thermal plant is passed through the electric wires to charge the dust particles.
Statement II : Particulate matter (PM 2.5) cannot be removed by scrubber but c...

Natural selection where more individuals acquire specific character value other than the mean character value, leads to

Which of the following statements is not true?

Nitrogenous waste is excreted in the form of pellet or paste by :

Given below are two statements:
Statement I : Autoimmune disorder is a condition where body defense mechanism recognizes its own cells as foreign bodies.
Statement II : Rheumatoid arthritis is a condition where body does not attack self cel...

Select the incorrect statement with respect to acquired immunity.

Which of the following statements are true for spermatogenesis but do not hold true for Oogenesis?
(a) It results in the formation of haploid gametes
(b) Differentiation of gamete occurs after the completion of meiosis
(c) Meiosis occurs co...

Given below are two statements :
Statement I : The release of sperms into the seminiferous tubules is called spermiation.
Statement II : Spermiogenesis is the process of formation of sperms from spermatogonia.
In the light of the above stat...

At which stage of life the oogenesis process is initiated?