NATURE OF GENE
rubab The word “gene” was defined in 1909 by Danish botanist Wilhelm Johannsen as the fundamental physical and functional unit of heredity. The word was derived pangenesis used by Darwin (1868)…
Botany
DNA REPLICATION
Following steps take place in the replication of DNA: Origin of replication The replication of a DNA molecule begins at special sites called origins of replication. The cukaryotic DNA contains…
Krebs cycle (Tricarboxylic Acid Cycle)
sana Krebs cycle is a series of reactions in which the pyruvate from glycolysis is oxidized to CO2. The Krebs cycle was discovred by Hans Krebs in the I 93th. 1v‘o…
OBJECTIVES & FILL IN THE BLANKS OF ULTRASTRUCTURE
Multiple Choice Questions (MCQs) Which of the following is not the function of SER? (a) Synthesis of lipids (h) Detoxification of drugs (c) Muscle contraction (d) Protein synthesis Which of…
SUBJECTIVE & SHORT QUESTIONS OF ULTRASTRUCTURE
SUBJECTIVE QUESTIONS Describe structure and function of Endoplasmic reticulum. Write note on plastids? Describe structure of chloroplast. Describe structure and function of mitochondria. Write note on Dictyosome. Give structure and…
DEFINITIONS AND KEY POINTS OF ULTRASTRUCTURE1
TERMS 11 DEFINITIONS Plastids The membranous bound and pigment containing bodies present in the cell are called plastids. l’rotoplastid The newIN form plastid is called protoplastid. I:floplast It then changes…
GLYOXISOMES
Glyoxisomes are cytoplasmic organelles. These are present only in plant cells. These are most abundant in plant seedlings. Glyoxisoines are present only for short period of germination of seed. These…
PEROXISOME
Peroxisomes are cytoplasmic organelles. De-Duve and coworkers isolated peroxisome from liver cells and some other tissues. They are present in both animals and plants. They are also found in protozoa,…
MICROBODIES
Any of three distinct classes (peroxisomes, glyoxysomes, and microperoxisomes) of cytoplasmic organelles that are bounded by a single membrane and contain a variety of enzymes is called microbody.
VACUOLE
Vacuoles are compartments within the protoplast bounded by membrane tonoplast containing sap (aqueous solution). Vacuoles are present in both plant and animal cells. But they are most abundant in plant…