NEET 2023

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...

Given below are two statements :
Statement I : Endarch and exarch are the terms often used for describing the position of secondary xylem
in the plant body.
Statement II : Exarch condition is the most common feature of the root system.
In ...

Radial symmetry is NOT found in adults of phylum ______.

Select the correct statements with reference to chordates.
A. Presence of a mid-dorsal, solid and double nerve cord.
B. Presence of closed circulatory system.
C. Presence of paired pharyngeal gill slits.
D. Presence of dorsal heart
E. Tripl...

The unique mammalian characteristics are :

Among ‘The Evil Quartet’, which one is considered the most important cause driving extinction of species?

The historic Convention on Biological Diversity, ‘The Earth Summit’ was held in Rio de Janeiro in the year

Cellulose does not form blue colour with Iodine because

Given below are two statements:
Statement I: A protein is imagined as a line, the left end represented by first amino acid (C-terminal) and
the right end represented by last amino acid (N-terminal).
Statement II: Adult human haemoglobin, c...

Given below are two statements :
Statement I : Low temperature preserves the enzyme in a temporarily inactive state whereas high
temperature destroys enzymatic activity because proteins are denatured by heat.
Statement II : When the inhibi...

During the purification process for recombinant DNA technology, addition of chilled ethanol precipitates out

In gene gun method used to introduce alien DNA into host cells, microparticles of ________ metal are used.

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 desi...

Which of the following is not a cloning vector?

Match List I with List II.

.tg {border-collapse:collapse;border-spacing:0;}
.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break:normal;}...

Which of the following statements are correct?
A. Basophils are most abundant cells of the total WBCs
B. Basophils secrete histamine, serotonin and heparin
C. Basophils are involved in inflammatory response
D. Basophils have kidney shaped n...

Vital capacity of lung is ________.

The process of appearance of recombination nodules occurs at which sub stage of prophase I in meiosis?

Which of the following stages of meiosis involves division of centromere?

Among eukaryotes, replication of DNA takes place in :

Match List I with List II:

.tg {border-collapse:collapse;border-spacing:0;}
.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break:normal;}...

Select the correct statements.
A. Tetrad formation is seen during Leptotene.
B. During Anaphase, the centromeres split and chromatids separate.
C. Terminalization takes place during Pachytene.
D. Nucleolus, Golgi complex and ER are reformed...

Given below are two statements:
Statement I : During G0 phase of cell cycle, the cell is metabolically inactive.
Statement II : The centrosome undergoes duplication during S phase of interphase.
In the light of the above statements, choose...

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

How many different proteins does the ribosome consist of?

Which of the following are NOT considered as the part of endomembrane system?
A. Mitochondria
B. Endoplasmic reticulum
C. Chloroplasts
D. Golgi complex
E. Peroxisomes
Choose the most appropriate answer from the options given below:

Which of the following functions is carried out by cytoskeleton in a cell?

Which of the following are NOT under the control of thyroid hormone?
A. Maintenance of water and electrolyte balance
B. Regulation of basal metabolic rate
C. Normal rhythm of sleep-wake cycle
D. Development of immune system
E. Support the p...

Match List I with List II

.tg {border-collapse:collapse;border-spacing:0;}
.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break:normal;}
...

Once the undigested and unabsorbed substances enter the caecum, their backflow is prevented by

Match List I with List II.

.tg {border-collapse:collapse;border-spacing:0;}
.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break:normal;}...

Identify the correct statements :
A. Detrivores perform fragmentation.
B. The humus is further degraded by some microbes during mineralization.
C. Water soluble inorganic nutrients go down into the soil and get precipitated by a process cal...

In the equation GPP \(-\) R = NPP
GPP is Gross Primary Productivity
NPP is Net Primary Productivity
R here is __________.

Which one of the following statements is NOT correct?

Match List I with List II:

.tg {border-collapse:collapse;border-spacing:0;}
.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break:normal;}...

The thickness of ozone in a column of air in the atmosphere is measured in terms of :

Which of the following statements is correct?

Given below are two statements:
Statement I: Electrostatic precipitator is most widely used in thermal power plant.
Statement II : Electrostatic precipitator in thermal power plant removes ionising radiations.
In the light of the above stat...

Select the correct group/set of Australian Marsupials exhibiting adaptive radiation.

Given below are two statements:
Statement I: RNA mutates at a faster rate.
Statement II: Viruses having RNA genome and shorter life span mutate and evolve faster.
In the light of the above statements, choose the correct answer from the opti...

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : Nephrons are of two types: Cortical & Juxta medullary, based on their relative position in cortex
and medulla.
Reason R : J...

Match List I with List II.

.tg {border-collapse:collapse;border-spacing:0;}
.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break:normal;}...

Which of the following statements are correct?
A. An excessive loss of body fluid from the body switches off osmoreceptors.
B. ADH facilitates water reabsorption to prevent diuresis.
C. ANF causes vasodilation.
D. ADH causes increase in blo...

Which one of the following common sexually transmitted diseases is completely curable when detected early and treated properly?

Which one of the following techniques does not serve the purpose of early diagnosis of a disease for its
early treatment?

In which blood corpuscles, the HIV undergoes replication and produces progeny viruses?

Match List I with List II.

.tg {border-collapse:collapse;border-spacing:0;}
.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break:normal;}...

Match List I with List II.

.tg {border-collapse:collapse;border-spacing:0;}
.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break:normal;}...

Which of the following statements are correct regarding female reproductive cycle?
A. In non-primate mammals cyclical changes during reproduction are called oestrus cycle.
B. First menstrual cycle begins at puberty and is called menopause.
...

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Endometrium is necessary for implantation of blastocyst.
Reason R: In the absence of fertilization, the corpus luteum degene...