Which of the following is responsible for the mechanical support, protein synthesis and enzyme transport?
Cell membrane
Mitochondria
Dictyosome
Endoplasmic reticulum
Thickening of arteries due to cholesterol deposition is
arteriosclerosis
rheumatic heart
blood pressure
cardiac arrest
An example of competitive inhibition ofan enzyme is the inhibition of
succinic dehydrogenase by malonic acid
cytochrome oxidase by cyanide
hexokinase by glucose-6-phosphate
carbonic anhydrase by carbon dioxide
Which of the following is the connecting link between glycolysis and Krebs cycle?
Acetyl Co- A
Oxalosuccinic acid
Pyruvic acid
Citric acid
Which of the following contain -1, 4 linkage?
Maltose
Sucrose
Lactose
Fructose
C.
Lactose
Lactose or milk sugar (carbohydrate) is reducing sugar formed through - 1, 4 condensation between galactose and glucose. Lactose does not occur in nature except as a product of the mammary gland. It is highest in human milk as compared to that of cow, buffalo and goat. Lactose is a product of glucose, fructose and galactose.
Maltose or malt sugar is a disaccharide formed from two units of glucose joined with an (14) bond. It is found in germinating grain, in a small proportion in corn syrup and forms on the partial hydrolysis of starch.
Sucrose or table sugar is a disaccharide where a molecule is composed of two monosaccharides, glucose and fructose. It is produced naturally in plants, from which table sugar is refined. It is extracted and refined from either sugar cane or sugar beet.
Fructose or fruit sugar is a simple ketonic monosaccharide found in many plants, where it is often bonded to glucose to form disaccharide sucrose.
Which statement is true?
Adenine has 4 nitrogen atoms.
Cytosine has 3 nitrogen atoms
Guanosine has 3 nitrogen atoms
Uracil has 5 nitrogen atoms
Which of the following helps in ascent of sap?
Root pressure
Transpiration
Capillarity
All of these
Which of the following is correct set of micronutrient for plants?
Mg, Si, Fe, Cu, Ca
Cu, Fe, Zn, B, Mn
Mg, Fe, Zn, B, Mn
Mo, Zn, Cl, Mg, Ca
Velamen present in orchids helps in
absorption of nutrients from host plant
respiration
absorption of moisture from air
synthesising food