Q1. Tissues are:

A. Group of cells which serve a common function.
B. Compartments with in cells.
C. Proteins.
D. Organisms.
E. Cells.

Q2. The three main domains of life are:

A. plants, animals and protists.
B. Bacteria, fungi and eukaryotes.
C. Eukaryotes, prokaryotes and viruses.
D. Eukaryotes, prokaryotes and fungi.
E. Archaea, bacteria and eukaryotes.

Q3. The sub-atomic particles which play the biggest role in cellular chemical reactions (bonding) are:

A. Protons.
B. Neutrons.
C. Electrons.
D. Isotopes
E. Prions

Q4. The atomic weight of an atom is equivalent to:

A. Number of electrons.
B. Number of electrons in the outer shell accessible for bonds.
C. Number of protons.
D. Number of neutrons and protons.
E. Number of electrons and protons.

Q5. The difference between 12C and 14C is:

A. 2C.
B. 2 protons.
C. 2 electrons.
D. 2 neutrons.
E) 2 ionic bonds