ph and amylase activity

Take a thin layer of tissue from the lower surface of the leaf. Mount it on a slide in water and examine under a microscope. You will find tiny pores or stomata along with the epidermal cells. The stomata are bound by a pair of guard cells whose concave sides face each other. It is through the stom..

Take hydrated copper (II) sulphate crystals in a test tube and heat. The blue crystals in the test tube start turning white on heating. Water vapours released on heating condense on the cooler part of the test tube. Collect the water drops in a dish. The crystalline copper sulphate turns to a whit..

Take a nichrome wire of about 50 cm length and apply a potential difference of 1.5 V from a battery. Measure the current flowing through the wire using an ammeter connected to it in series, and note the potential difference across the resistance using a voltmeter connected across it. Note down and ..

During increased body activity the CO 2 content of blood raises. It combines with water to form carbonic acid in the blood. This lowers the pH, which increases the heart be..

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Hold a bottle cork in one hand firmly and cut a thin slice with the help of a blade. Place the section in a drop of water on a glass slide and observe under a microscope. You will find cells, which are box-like and closely packed togethe..

(formation of organometallic compounds) Haloalkanes react with other active metals such as lithium, zinc, mercury, lead, etc. in the presence of dry ether to form the corresponding organometallic compounds. For example, Tetraethyl lead (TEL) is used as an antiknocking agent in gasoli..

It is the step in which each of the participating amino acid reacts with ATP to form amino acid AMP complex and pyrophosphate. The reaction is catalyzed by a specific amino acid activating enzyme called aminoacyl-tRNA synthetase in the presence of Mg2+. There is a separate aminoacyl tRNA..

Pancreas are present at the end of the duodenum. It secretes pancreatic juice which has an almost neutral pH (6 to 7). Pancreatic juice consists of enzymes like the pancreatic amylase (to act on carbohydrates), trypsin (to act on proteins) and lipase (to act on lipids and fats)..

. The bolus thus partially digested is now called the chyme. Chyme is then passed into the small intestine, the opening of which is guarded by the pyloric sphincter. The first portion of the small intestine, the duodenum gets the pancreatic and the bile juice. The intestinal lumen has an alkaline h..