THE ENDOPLASMIC RETICULUM (ER)
abidaThe word endoplasmic means "within" the cytoplasm. The word reticulum means "network." The ER consists of a network of membranous tubules and sacs called cisternae. The ER are extensive in…
LIPIDS
rubabLipids are nonpolar organic molecules that are insoluble in polar water but soluble in nonpolar organic solvents like ether, alcohol, and chloroform. Lipids show hydrophobic behavior. The behaviour is associated…
RIBOSOMES
Ribosomes are non-membranous bounded strOctures. Ribosomes are the sites where the cell synthesizes proteins according to genetic instructions. A bacterial cell may have a few thousand ribosomes.But a human liver…
SHORT QUESTIONS OF CLASSIFICATION
sidra1.Define Classifcation Ans: The arrangement of plants into groups and sub-groups on the basis of similarities is called classification. The characters which are uses as basis of classification are called…
MODEL SUBJECTIVE QUESTIONS FOR DIFFUSION, OSMOSIS, ABSORPTION
sanaWhat is diffusion? Give factors affecting the rate of diffusion. What is imbibition? Give its significance? What is osmosis? Give its demonstration. Give factors affecting osmosis. Describe water relations. What…
DEFINITIONS AND KEY- POINTS FOR OBJECTIVES OF DIFFUSION, OSMOSIS, ABSORPTION
TERMS .. . DEFINITIONS Diffusion The movement of molecules from higher - concentrationto lowerconcentrationis called Chemical potential . The total kinetic energy of the molecules is called chemical potential.• Graham's…
IISTOMATA AND ITS PHYSIOLOGYII
STRUCTURE OF STOMATA The stomata are the pathways through which transpiration and gaseous exchange take place. The stomata are elliptical pores in the epidermis of plants. They occur mostly on…
CARBOHYDRATES
Carbohydrates are polyhydroxy aldehydes or ketones. Carbohydrates are sugars and their polymers. They are composed of carbon, hydrogen and oxygen. The word carbohydrates literally mean hydrated carbons. The ratio of…
Factors which affect transpiration rate
Following factors affect the rate of transpiration: (a) External factors Humidity of air Water is evaporated through the stomata. This follows the simple law of diffusion. 'Ibis diffusion can take…
Subjective Question Of Classification
Discuss different systems of classification. Describe artificial classification of Carolus Linnaeus. Describe classification system of .fussieu. Describe classification system of Bentham and Hooker. Discuss classification system of Wilhelm Eichler. Discuss…