Given below are two statements:
Statement I: During G_o 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 the most appropriate answer from the option below:

NEET-2023 Cell-Cycle-and-Cell-Division [class-xi ]

• Statement I is incorrect but Statement II is correct.
• Both Statement I and Statement II are correct
• Both Statement I and Statement II are incorrect.
• Statement I is correct but Statement II is incorrect.
Correct Option: A  [ Statement I is incorrect but Statement II is correct. ]

Remark:

Select the correct statements
A.Tetrad formation is seen during leptotene.
B.During Anaphase, the centromere split and chromatids separate.
C.Terminalization takes place during Pachytene.
D.Nucleolus, Golgi complex and ER are reformed during Telophase.
E.Crossing over takes place between sister chromatids of homologous.
Choose the correct answer from the option given below:

NEET-2023 Cell-Cycle-and-Cell-Division [class-xi ]

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

Remark:

Which of the following statements are correct?
A.Basophils are most aboundant cell of the total WBCs.
B.Basophils secrete histamine, serotonin and heparin.
C.Basophils are involved in inflammatory response.
D.Basophils have kidney shaped nucleus.
E.Basophil are agranulocyte.
Choose the correct answer from the options given below:

NEET-2023 Body-Fluids-and-Circulation [class-xi ]

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

Remark:

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 blood pressure.
E.ADH is responsible for decrease in GFR.
Choose the correct answer from the options given below:

NEET-2023 Excretory-Products-and-their-Elimination [class-xi ]

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

Remark:

Which of the following statements are correct regarding skeletal muscle?
A.Muscle bundles are held together by collagenous connective tissue layer called fascicle.
B.Sarcoplasmic reticulum of muscle fibre is a store house of calcium ions.
C.Striated appearance of skeletal muscle fibre is due to distribution pattern of actin and myosin proteins.
D.M line is considered as functional unit of contraction called sarcomere.
Choose the most appropriate answer from the options given below:

NEET-2023 Locomotion-and-Movement [class-xi ]

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

Remark:

The parts of human brain that helps in regulation of sexual behaviour, expression of excitement, pleasure, rage, fear etc. are:

NEET-2023 Neural-Control-and-Coordination [class-xi ]

• Corpus callosum and thalamus
• Limbic system & hypothalamus
• Corpora quadrigemina & hippocampus
• Brain stem & epithalamus
Correct Option: B  [ Limbic system & hypothalamus ]

Remark:

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 process of R.B.Cs formation.
Choose the correct answer from the options given below:

NEET-2023 Chemical-Coordination-and-Integration [class-xi ]

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

Remark:

Which one of the following is the sequence on corresponding coding strand, if the sequence on mRNA formed is as follow
5'-AUCGAUCGAUCGAUCGAUCGAUCGAUCG-3?

NEET-2023 Molecular-Basis-of-Inheritance [class-xii ]

• 3'-ATCGATCGATCGTCGATCGATCGATCG-5'
• 5'-UAGCUAGCUAGCUAGCUAGCUAGC UAGC-3'
• 3'-UAGCUAGCUAGCUAGCUAGCUAGCUAGC-5'
• 5'-ATCGATCGATCGATCGATCGATCGATCG-3'
Correct Option: D  [ 5'-ATCGATCGATCGATCGATCGATCGATCG-3' ]

Remark:

Which one of the following NOT an advantage of inbreeding?

NEET-2023 Strategies-for-Enhancement-in-Food-Production [class-xii ]

• It decreases the productivity of inbred population, after continuous inbreeding.
• It decreases homozygosity.
• It exposes harmful recessive genes that are eliminated by selection.
• Elimination of less desirable genes and accumulation of superior genes takes place due to it.
Correct Option: A  [ It decreases the productivity of inbred population, after continuous inbreeding. ]

Remark:

Match List-I with List-II.

NEET-2023 Organisms-and-Populations [class-xii ]

• A-II, B-IV, C-III, D-I
• A-II, B-I, C-III, D-IV
• A-II, B-III, C-I, D-IV
• A-II, B-IV, C-I, D-III
Correct Option: B  [ A-II, B-I, C-III, D-IV ]

Remark: