NURSING ANM AND GNM

NURSING EXAM QUESTIONS

BIOCHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following carbohydrates is an important structural molecule, yet humans cannot digest it?
A
glucose
B
starch
C
cellulose (fiber)
D
triglyceride
Explanation: 

Detailed explanation-1: -Cellulose is the primary structural molecule in plant and algae cell walls. Since human digestive enzymes cannot break down the glycosidic linkages in cellulose, humans are unable to digest it.

Detailed explanation-2: -This gives cellulose its rigidity and high tensile strength, which are important to plant cells. The glycosidic linkages in cellulose can’t be broken by human digestive enzymes, so humans are not able to digest cellulose.

Detailed explanation-3: -Fiber is a type of carbohydrate that the body can’t digest. Though most carbohydrates are broken down into sugar molecules called glucose, fiber cannot be broken down into sugar molecules, and instead it passes through the body undigested.

Detailed explanation-4: -Cellulose cannot be directly utilised by the human body as a source of energy. Humans are unable to digest cellulose because the appropriate enzymes to breakdown the beta acetal linkages are lacking.No vertebrate can digest cellulose directly.

Detailed explanation-5: -Glucose, or blood sugar, is the main source of energy for your body’s cells, tissues, and organs. Glucose can be used immediately or stored in the liver and muscles for later use.

There is 1 question to complete.