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Biology 1525 MCQs [All-Courses]

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Biology covers key concepts of life, organisms, and human systems with exam-focused notes for PPSC, FPSC, KPPSC, BPSC.,NTS, OTS, AJKPSC. Clear, concise topics help students prepare effectively for competitive tests.

All Topics  1525

The energy currency of the cell is called ___________?

A ATP
B DNA
C RNA
D ADP
Correct Answer: ATP

The expression of a transgene in the target tissue is identified by a ___________?

A Transgene
B Promoter
C Enhancer
D Reporter
Correct Answer: Reporter

Bacteria protect themselves from viruses by fragmenting viral DNA with ____________?

A Ligase
B Endonuclease
C Exonuclease
D Gyrase
Correct Answer: Endonuclease

ELISA is _________?

A Using radiolabelled second antibody
B Usage of RBCs
C Using complement-mediated cell lysis
D Addition of substrate that is converted into a coloured end product
Correct Answer: Addition of substrate that is converted into a coloured end product

The DNA fragments have sticky ends due to___________?

A Endonuclease
B Unpaired bases
C Calcium ions
D Free methylation
Correct Answer: Unpaired bases

Which of the following is the quality of improved transgenic basmati rice?

A Gives high yield but no characteristic aroma
B Gives high yield and is rich in vitamin A
C Does not require chemical fertilizers and growth hormones
D Resistant to insects and diseases
Correct Answer: Gives high yield and is rich in vitamin A

The first transgenic plant to be produced is__________?

A Brinjal
B Tobacco
C Rice
D Cotton
Correct Answer: Tobacco

RNA interference helps in__________?

A Cell proliferation
B Micropropagation
C Cell defence
D Cell differentiation
Correct Answer: Cell defence

The first clinical application of gene therapy over a 4 year old girl was for_________?

A Adenosine deaminase deficiency
B Adenosine deficiency
C Growth deficiency
D Adenine deficiency
Correct Answer: Adenosine deaminase deficiency

Plasmids are used as cloning vectors for which of the following reasons?

A Can be multiplied in culture
B Self-replication in bacterial cells
C Can be multiplied in laboratories with the help of enzymes
D Replicate freely outside bacterial cells
Correct Answer: Self-replication in bacterial cells
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