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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

E. coli and example of____________?
A Aerobic bacteria
B Anaerobic bacteria
C Facultative bacteria
D Microaerophilic
Correct Answer: Facultative bacteria
Spirochete is an example of___________?
A Aerobic bacteria
B Anaerobic bacteria
C Facultative bacteria
D Microaerophilic
Correct Answer: Anaerobic bacteria
Rapid growth at exponential ration occurs in which phase of bacterial growth:
A Lag phase
B Log phase
C Stationary phase
D Death / decline phase
Correct Answer: Log phase
Chemical substances used on living tissues that inhibit the growth of micro organism are called___________?
A Antiseptics
B Disinfectants
C Antibiotics
D Vaccines
Correct Answer: Antiseptics
Who developed the vaccine against anthrax?
A Louis Pasteur
B Edward Jennar
C Leuvenhoek
D Alexander Fleming
Correct Answer: Louis Pasteur
Cyanobacteria have ________ cell wall?
A Gram +ve.
B Gram – ve.
C Acid fast
D Cellulose rich
Correct Answer: Gram – ve.
Which of the following help cyanobacteria to locomote?
A Flagella
B Gas vesicles
C Both of these
D None of these
Correct Answer: Gas vesicles
Cyanobacteria reproduce by____________?
A Binary fission
B Mitosis
C Meiosis
D Conjugation
Correct Answer: Binary fission
Approximately _____ species of bacteria are known to cause diseases in humans.
A 100
B 200
C 300
D 400
Correct Answer: 200
A group of 8 cocci is called______________?
A Diplococci
B Octococci
C Tetrad
D Sarcina
Correct Answer: Sarcina
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