The enzyme in saliva that begins starch digestion is:
A. Amylase
B. Lipase
C. Pepsin
D. Trypsin
Answer: Option A
Solution (By JKSSB Mock Tests)
Salivary amylase (ptyalin) hydrolyzes starch into maltose and dextrins in the mouth. It functions optimally at neutral to slightly alkaline pH. Pepsin digests proteins in the stomach, lipase digests fats, trypsin is a pancreatic protease. Salivary amylase action ceases in the acidic stomach.
Explanation:
Oryza sativa is the scientific name of rice, the staple food for a large part of the world. Triticum aestivum is wheat, Zea mays is maize, Hordeum vulgare is barley. All are cereals of the Poaceae family.
Explanation:
Translation is the process where the genetic code carried by mRNA is decoded to synthesize a specific sequence of amino acids, forming a protein. This process occurs at the ribosomes in the cytoplasm. Ribosomes read the mRNA codons and match them with the anticodons of tRNA molecules carrying the corresponding amino acids.
Explanation:
Rennin (chymosin) is a proteolytic enzyme found in the gastric juice of young mammals; it curdles milk by converting soluble caseinogen into insoluble casein, slowing its passage and allowing pepsin to digest it. Pepsin is the main adult protease, trypsin is pancreatic, and lipase digests fats. Rennin is now produced biotechnologically for cheese making.
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