NURSING ANM AND GNM

NURSING EXAM QUESTIONS

BIOCHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In plants, a storage product that results from the dehydration synthesis of many glucose molecules is
A
protein
B
a phosphate
C
an oil
D
starch
Explanation: 

Detailed explanation-1: -Starch is the stored form of sugars in plants and is made up of a mixture of two polysaccharides, amylose and amylopectin (both polymers of glucose).

Detailed explanation-2: -Glucose is easily soluble in water, therefore, plants store glucose in the form of insoluble starch in leaves, root tubers, fruits, etc. Plants utilise this stored starch as a source of energy for life activities and prepare substances that are required for their growth.

Detailed explanation-3: -Dehydration synthesis reaction between two molecules of glucose, forming a molecule of maltose with the release of a water molecule. In the dehydration synthesis reaction above, two molecules of the sugar glucose (monomers) combine to form a single molecule of the sugar maltose.

Detailed explanation-4: -Starch is the storage form of glucose in plants, stored in seeds, roots, and tubers for later use as an energy source for the plant to reproduce.

Detailed explanation-5: -An advantage of storing energy as starch, rather than fats and oils, is that it is easily stored by cells and is also easy to access. Starch is a quick molecule to break down to access the glucose needed for energy release.

There is 1 question to complete.