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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 is an organic compound found in most cells ?
A Water
B Glucose
C Oxygen
D Sodium chloride
Correct Answer: Glucose
Biological sciences have a set methodology and it is based on ?
A Experimental inquiry
B Esthetic preference
C Philosophical ideas
D Imaginations
Correct Answer: Experimental inquiry
Proteins are made from amino acids by the process of ______________?
A Hydrolysis
B Pinocytosis
C Dehydration synthesis
D Active transport
Correct Answer: Dehydration synthesis
An unbroken series of species arranged in ancestors to descendent sequence with each later species having evolved from one that immediately preceded it is called?
A Biome
B Phyletic lineage
C Community
D Population
Correct Answer: Phyletic lineage
Sodium ions are “pumped” from a region of lower concentration to a region of higher concentration in the nerve cells of humans. This process is an example of
A Diffusion
B Passive transport
C Osmosis
D Active transport
Correct Answer: Active transport
It is possible to date the rocks by comparing the amount of specific radioactive isotopes they contain. Which of the statement is correct in this respect?
A Older sediment layers have equal amount of these radioactive isotopes as that of the young ones
B Older sediment layers have less amount of these radioactive isotopes as that of the young ones.
C Older sediment layers have greater amount of these radioactive isotopes as that of the young ones.
D Older sediment layers did not have these radioactive isotopes
Correct Answer: Older sediment layers have less amount of these radioactive isotopes as that of the young ones.
Normally, in the process of osmosis, the net flow of water molecules into or out of the cell depends upon differences in the ?
A Concentration of water molecules inside and outside the cell
B Concentration of enzymes on either side of the cell membrane
C Rate of molecular motion on either side of the cell membrane
D None of these
Correct Answer: Concentration of water molecules inside and outside the cell
The concept that various organisms dominated this planet during various geological time period and thus placing organisms in a time squence came from the studies by ?
A Environmental biologist
B Paleontologist
C Marine biologist
D Social biologist
Correct Answer: Paleontologist
Most cell membranes are composed principally of ?
A DNA ad protein
B Protein and Lipids
C Protein and Chitin
D Protein and RNA
Correct Answer: Protein and Lipids
A large regional community primarily determined by climate is called ?
A Population
B Community
C Biome
D Habitat
Correct Answer: Biome
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