Tag: bio-chemistry

Questions Related to bio-chemistry

Which reserve food is consumed by man during starvation:

bio-chemistry from tasting to digestion types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

  1. Fat

  2. Protein

  3. Glycogen

  4. Vitamin

Show answer
Correct Option: A
Explanation:

Starvation is defined as a severe deficiency in calorie energy intake needed to maintain human life.

During first stage of starvation, glucose levels are maintained through production of glucose from proteins, glycogen and fats.Then body burns fats first exhusting contents of digestive tract along with glycogen resetrves stored in liver cells.

Which of the following break down the food into the simpler form that the body can use?

bio-chemistry from tasting to digestion types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

  1. Digestive juice

  2. Teeth

  3. Water

  4. None of the above

Show answer
Correct Option: A
Explanation:

The digestive juices consist of saliva, gastric juice, pancreatic juice, intestinal juice and bile. They help in break down of complex food into simpler building block components that can easily be absorbed by the body. These reactions occur outside the cells lining the gut.

So the correct answer is 'Digestive juice'.

Most digestion and all absorption of food take place in the :-

bio-chemistry from tasting to digestion types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

  1. small intestine

  2. large intestine

  3. stomach

  4. caecum

Show answer
Correct Option: A
Explanation:

Pepsin is the chief digestive enzyme in the stomach that stomach that breaks down proteins. Cells produce pepsinogen that is produced to act on mucus by epithelial cells of the stomach that helps to protect the lining of the stomach from corrosive hydrochloric acid and pepsin. And the absorption is done in small intestine.

So, the correct option is 'small intestine'.

Which part of the body contains teeth?

bio-chemistry digestion of food types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

  1. Buccal cavity

  2. Body cavity

  3. Both A and B

  4. Tooth cavity

Show answer
Correct Option: A
Explanation:

The mouth leads to the buccal cavity or oral cavity. The oral cavity has a number of teeth and a muscular tongue. Teeth help in mastication of food when tongue helps in mixing of food with saliva.

So the correct answer is 'Buccal cavity'.

The process of taking in food from the environment is called 

bio-chemistry digestion of food types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

  1. Ingestion

  2. Digestion

  3. Assimilation

  4. Nutrition

Show answer
Correct Option: A
Explanation:

  • Ingestion is the consumption of a substance by an organism.
  •  In animals, it normally accomplished by taking in the substance through the mouth into the gastrointestinal tract, such as through eating or drinking. 
  • In single-celled organisms, ingestion can take place by taking the substance through the cell membrane. Hence, The process of taking in food from the environment is called ingestion.
So, the correct answer is 'ingestion'.

In the buccal cavity, food is broken down by the teeth of

bio-chemistry digestion of food types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

  1. Upper jaw only

  2. Lower jaw only

  3. Both A and B

  4. Tongue

Show answer
Correct Option: C
Explanation:

The tongue is a muscular structure that cannot break down food. The food is broken down by the teeth of the upper jaw and lower jaw. Teeth is a hard part of the mouth that has a hard chewing surface covering made up of an enamel which helps in the mastication of food.

So the correct answer is 'Both A and B'.

The fluid secreted in the mouth for partial breakdown of food is called as

bio-chemistry digestion of food types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

  1. Gastric juice

  2. Pancreatic juice

  3. Saliva

  4. Hormone

Show answer
Correct Option: C
Explanation:

Saliva is present in the buccal cavity. It helps in lubricating and adhering the masticated food particles into a bolus.(mass of food) has salivary amylase that hydrolyzed 30% of starch into maltose. Hence, it helps in particle digestion of food.

So the correct answer is 'Saliva'.

A bolus is

bio-chemistry digestion of food types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

  1. A mass of crushed food moistened with saliva

  2. The semisolid material resulting from partial digestion in the stomach

  3. The milky emulsified fat absorbed from small intestine

  4. Indigestible materials that help in movement and absorption of food

Show answer
Correct Option: A
Explanation:

A bolus is a mass of crushed food moistened with saliva.

So the correct option is A.

Which of the following is a phosphoryalting unit?

bio-chemistry life processes in living organisms- part 1 microbodies living organisms and energy production single membrane bound organelles

  1. Oxysome

  2. Vaculoes

  3. Peroxisome

  4. Mitochondria

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Correct Option: A
Explanation:

Oxysomes are found in inner mitochondrial membrane and also called ad $F _1$ or elementary particles. It contains enzymes ATP synthase responsible for synthesis of ATP. They act as phosphorylating unit.

Which of the following organ has single membrane?

bio-chemistry structure and function of cell organelles microbodies living organisms and energy production single membrane bound organelles

  1. Nucleus

  2. Cell wall

  3. Mitochondria

  4. Sphaerosomes

Show answer
Correct Option: D
Explanation:

Spherosomes are membrane covered small spherical organelles which synthesize and store fats. They are covered with a single half unit membrane.