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The hydrolysis of lactose can be catalysed only by the enzyme lactase. Also, lactase is only able to work on lactose and no other compound.
Consider the following statements.
1. Monosaccharides are the simple carbohydrates.
2. Monosaccharides are sweet in taste.
3. Monosaccharides upon heating get charred and give the smell of burning sugar.
Which of the statement (s) given above is/are correct?
Immobilised lactase is used to hydrolyse lactose in dairy waste to glucose and galactose. Enzyme is immobilised in resin particles and packed into a 0.5 m3 column. The total effectiveness factor for the system is close to unity; Km for the immobilised enzyme is 1.32 kg m-3; Vmax is 45 kg m-3 h-1. The lactose concentration in the feed stream is 9.5 kg m-3; a substrate conversion of 98% is required. The column is operated with plug flow for a total of 310 d per year. At what flow rate should the reactor be operated?
Low levels of the enzyme lactase may lead to lactose intolerance. Symptoms of lactose intolerance include ALL of the following EXCEPT?
In a child with lactose intolerance and absent lactase activity, which of the following foods is least likely to cause symptoms?
Which of the following are true with regard to anaerobic respiration in bacteria?
P. The final electron acceptor is an inorganic substance other than molecular oxygen.
Q. The number of ATP molecules produced per glucose molecule is more than that produced in aerobic respiration.
R. The number of ATP molecules produced per glucose molecule is less than that produced in aerobic respiration.
S. Only substrate level phosphorylation is used to generate ATP.
Steps given are to draw an involute of a given square ABCD. Arrange the steps. i. With B as centre and radius BP1 (BA+ AD) draw an arc to cut the line CB-produced at P2. ii. The curve thus obtained is the involute of the square. iii. With centre A and radius AD, draw an arc to cut the line BA-produced at a point P1. iv. Similarly, with centres C and D and radii CP2 and DP3 respectively, draw arcs to cut DC-produced at P3 and AD-produced at P4.
Which of the following is readily hydrolysed by water?
This is the insoluble precursor of pectin which when boiled in acid solution such as jelly making is hydrolysed to soluble pectin.
Which of the following statements are correct?
1. In scouring, proteins are hydrolysed into soluble products.
2. Knitted fabrics are scoured under wild processing conditions.
3. Hydrogen peroxide is universal bleaching agent.