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

NEET-2022 Respiration-in-Plants [class-xi ]

• To provide the site for photorespiratory pathway
• To increase the number of chloroplast for the operation of Calvin cycle
• To enable the plant to tolerate high temperature
• To protect the vascular tissue from high light intensity
Correct Option: B  [ To increase the number of chloroplast for the operation of Calvin cycle ]

Remark:

Which part of the fruit, labelled in the given figure makes it a false fruit?

NEET-2022 Sexual-Reproduction-in-Flowering-Plants [class-xii ]

• A → Mesocarp
• B → Endocarp
• C → Thalamus
• D → Seed
Correct Option: C  [ C → Thalamus ]

Remark:

Which of the following occurs due to the presence of autosome linked dominant trait?

NEET-2022 Principles-of-Inheritance-and-Variation [class-xii ]

• Sickle cell anaemia
• Myotonic dystrophy
• Haemophilia
• Thalessemia
Correct Option: B  [ Myotonic dystrophy ]

Remark:

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Mendel’s law of Independent assortment does not hold good for the genes that are located closely on the same chromosome.
Reason (R): Closely located genes assort independently.
In the light of the above statements, choose the correct answer from the options given below:

NEET-2022 Principles-of-Inheritance-and-Variation [class-xii ]

• Both (A) and (R) are correct and (R) is the correct explanation of (A)
• Both (A) and (R) are correct but (R) is not the correct explanation of (A)
• (A) is correct but (R) is not correct
• (A) is not correct but (R) is correct
Correct Option: C  [ (A) is correct but (R) is not correct ]

Remark:

If a geneticist uses the blind approach for sequencing the whole genome of an organism, followed by assignment of function to different segments, the methodology adopted by him is called as:

NEET-2022 Molecular-Basis-of-Inheritance [class-xii ]

• Sequence annotation
• Gene mapping
• Expressed sequence tags
• Bioinformatics
Correct Option: A  [ Sequence annotation ]

Remark:

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 lighter in colour
D. The springwood along with autumnwood shows alternate concentric rings forming annual rings
E. It has lower density
Choose the correct answer from the options given below :

NEET-2022 Molecular-Basis-of-Inheritance [class-xii ]

• A, B, D and E Only
• A, C, D and E Only
• A, B and D Only
• C, D and E Only
Correct Option: B  [ A, C, D and E Only ]

Remark:

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

NEET-2022 Biotechnology-Principles-and-Processes [class-xii ]

• 5'GATACT3'; 3'CTATGA5'
• 5'GAATTC3'; 3'CTTAAG5'
• 5'CTCAGT3'; 3'GAGTCA5'
• 5'GTATTC3'; 3'CATAAG5'
Correct Option: B  [ 5'GAATTC3'; 3'CTTAAG5' ]

Remark:

Transposons can be used during which one of the following ?

NEET-2022 Biotechnology-and-its-applications [class-xii ]

• Polymerase Chain Reaction
• Gene Silencing
• Autoradiography
• Gene sequencing
Correct Option: B  [ Gene Silencing ]

Remark:

Which one of the following will accelerate phosphorus cycle?

NEET-2022 Ecosystem [class-xii ]

• Burning of fossil fuels
• Volcanic activity
• Weathering of rocks
• Rain fall and storms
Correct Option: C  [ Weathering of rocks ]

Remark:

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?

NEET-2022 Environmental-Issues [class-xii ]

• CNG burns more efficiently than diesel
• The same diesel engine is used in CNG buses making the cost of conversion low
• It is cheaper than diesel
• It cannot be adulterated like diesel
Correct Option: B  [ The same diesel engine is used in CNG buses making the cost of conversion low ]

Remark: