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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

Which of the following is incorrect for the lysogenic cycle in life cycle of bacteriophage_____________?
A Phage when gets incorporated with the bacterial chromosome is called prophage
B The bacterium continues to live and reproduce normally
C Lysogenic bacteria may get infected by the related phage
D The cycle may convert into lytic type resulting from environmental exposure
Correct Answer: Lysogenic bacteria may get infected by the related phage
Which of the following virus has special affiliations with the tumor production:
A Hepatitis virus
B Retrovirus
C Polio virus
D Pox virus
Correct Answer: Retrovirus
The agent of controversial nature causing mad cow infection is_____________?
A Bacteria
B Cowpox Virus
C Adenovirus
D Prion
Correct Answer: Prion
Which of the following is the smallest known virus:
A Hepatitis virus
B Retrovirus
C Polio virus
D Pox virus
Correct Answer: Polio virus
An isolated virus is not considered living since it________________?
A Separates in to two inner parts
B Can not metabolize
C Rapidly looses its Genome chemical inert
D Is coated with an air tight shield
Correct Answer: Can not metabolize
Complex symptoms like severe pneumonia vascular tumor sudden weight loss swollen lymph nodes and immune deficiency are features of:
A Polio
B Hepatitis
C AIDS
D HIV
Correct Answer: AIDS
Bacteriopahage that infect E. coli are called_____________?
A M type
B N type
C T type
D S type
Correct Answer: T type
Which of the following statement about AIDS is incorrect:
A is a host specific disease
B An infected mother cannot pass the virus to her baby.
C Results in enlargement of lymph nodes
D Can be prevented.
Correct Answer: An infected mother cannot pass the virus to her baby.
Attachment of the bacteriophage with the receptor site on the bacterial cell wall involves_______________?
A Strong covalent bond between virion and the receptor site.
B Week chemical unior between them
C Both A and B depending upon the phage
D None of these
Correct Answer: Week chemical unior between them
Mode of transmission of hepatitis A is__________?
A Serum
B Faeco-oral
C Sexual contact
D All of these
Correct Answer: Faeco-oral
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