Most cell membranes are composed principally of ?
A. DNA ad protein
B. Protein and Lipids
C. Protein and Chitin
D. Protein and RNA
biology mcqs with answers
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
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
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
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
Proteins are made from amino acids by the process of ______________?
A. Hydrolysis
B. Pinocytosis
C. Dehydration synthesis
D. Active transport
Biological sciences have a set methodology and it is based on ?
A. Experimental inquiry
B. Esthetic preference
C. Philosophical ideas
D. Imaginations
Which is an organic compound found in most cells ?
A. Water
B. Glucose
C. Oxygen
D. Sodium chloride
A series of hypothesis supported by the results of many tests is called ?
A. Scientific law
B. Theory
C. Data
D. Deduction
Which are the four most abundant elements in living cells ?
A. carbon, oxygen, nitrogen, sulfur
B. carbon, oxygen, hydrogen, nitrogen
C. carbon, oxygen, sulfur, phosphorus
D. carbon, sulfur, hydrogen, magnesium
