Q.1: _____________ is a movement of a substance from a higher concentration region to a lower concentration region.
Q.2: ____________ plays an important role in exchange of gases and water in the life of a cell.
Q.3: The process in which the cell engulfs food and other material from its external environment is known as ____________.
Q.4: ____________ is a complex substance and provides structural strength to plants.
a) Cell membrane
Q.5: If the medium surrounding the cell has a higher water concentration than the cell, then the cell will gain water by osmosis. This solution is known as ____________ solution.
Q.6: The nucleus has a double layered covering called _________________.
a) nuclear membrane
b) cell membrane
Q.7: ___________ contain information for inheritance of features from parents to next generation in the form of DNA.
Q.8: If the medium surrounding the cell has a lower concentration of water than the cell, then the cell will lose water by osmosis. Such a solution is known as _____________ solution.
Q.9: How is osmosis different from diffusion ?
i) It occurs only in liquid medium.
ii) It requires a semi-permeable membrane.
iii) Flow of particles occur in one direction only.
a) i and ii
b) ii and iii
c) i, ii and iii
Q.10: When a living plant cell loses water through osmosis there is shrinkage or contraction of the contents of the cell away from the cell wall. This phenomenon is known as ____________.
Q.11: Functional segments of DNA are called ___________.
Q.12: Which of the following is an eukaryotic cell ?
a) human cell
Q.13: Which organism acquires food through endocytosis ?
Q.14: The plasma membrane is made up of ________ and __________.
a) proteins, carbohydrates
b) proteins, minerals
c) proteins, lipids
Q.15: The organisms whose cells lack a nuclear membrane are called _____________.