Biology Mcqs

The major cell infected by the HIV is lymphocyte ?

A. helper-T
B. B
C. both T and B
D. none of these

Which disease can be controlled by vaccination?

A. Measles
B. Cancer
C. Diabetes
D. Heart attack

What is the mode of transmission of Hepatitis virus?

A. Aerosol
B. Parentral (via blood)
C. Skin penetration
D. Unknown

Which statement is incorrect for pasteurization?

A. It is used to preserve yogurt and milk
B. It was developed by Louis Pasteur.
C. It involves heating the substance at high temperature for just few sec.
D. It can be used to preserve vegetables and meat.

A. lipid
B. protein
C. inorganic ion
D. vitamin

A. It is predictive
B. It has explanatory power
C. It discourages suggestion of different hypotheses
D. None of these

A series of hypothesis supported by the results of many tests is called ?

A. Scientific law
B. Theory
C. Data
D. Deduction

A. Hydrolysis
B. Pinocytosis
C. Dehydration synthesis
D. Active transport

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

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