Biology MCQS

41. The cell wall was discovered by:
A. Robert Hooke
B. Robert Brown
C. Antony Van Leeuwenhoek
D. Galileo

42. Cell wall of Neighboring cells is held together by an intercellular substance called:
A. Middle Lamella
B. Primary wall
C. Secondary wall
D. Plasmodesmata

43. Which one of the following is strongly optically active:
B. Middle lamella
C. Primary Wall
D. Secondary Wall
Tertiary Wall

44. Unit membrane model was proposed by:
A. Danielle and Daven
B. Singer and Nicolson
C. Robertson
D. Gorter and Grendel

45. Lipid Molecules in the membranes are the:
A. Glycolipids
B. Phospholipids
C. Terpenoids
D. Glycoprotein

46. The molecules of living matter that provide building blocks are mostly based on:
A. Carbon
B. Nitrogen
C. Hydrogen
D. Ammonia

47. Human blood is an example of:
A. Organelle
B. Tissues
C. Organic compound
D. Inorganic compounds

48. With different chemical arrangements and formation Of complex molecules, the life emerges on the level of the:
A. Cells
B. Tissues
C. Organs
D. Organ System

49. Organelles are:
A. Unicellular structures
B. Multi-cellular structures
C. Sub-cellular structures
D. Non-cellular structures