Ch-10 Question 1 to 20

Respiration in Organisms

Sr NO.	Question	Answer
1.	Why one is breathing so fast after running? (Why running makes a person breathe faster?) Why we breathe?	All living organisms respire to get energy from food. The air we breathe in is transported to all parts of the body and ultimately to each cell.
2.	All organisms are made of small microscopic units called ______?	Cells
3.	What is cell?	A cell is the smallest structural and functional unit of an organism.
4.	What are the functions performed by each cell of an organism?	Each cell of an organism performs certain functions such as nutrition, transportation, excretion and reproduction.
5.	Each cell of an organism performs certain functions such as nutrition, transportation, excretion and reproduction. Where does this energy come from?	During breathing, we breathe in air. Air contains oxygen. The air is transported to each cell. In the cells, oxygen helps in the breakdown of food. This breakdown releases energy.
6.	To perform the functions such as nutrition, transport, excretion and reproduction Each cell of an organism require _____?	Energy
7.	Why all living organisms respire?	All living organisms respire to get energy from food.
8.	What is happening in our body while we breathe?	During breathing, we breathe in air. Air contains oxygen. The air is transported to each cell. In the cells, oxygen helps in the breakdown of food. This breakdown releases energy.
9.	What is cellular respiration?	The process of breakdown of food in the cell with the release of energy is called cellular respiration.
10.	Where does Cellular respiration takes place?	Cellular respiration takes place in the cells of all organisms.
11.	What is aerobic respiration?	When breakdown of glucose occurs with the use of oxygen it is called aerobic respiration.
12.	What is anaerobic respiration?	When breakdown of glucose occurs without the use of oxygen it is called anaerobic respiration (Those organisms which are able to survive in the absence of air (oxygen) are called anaerobes.).
13.	What is the equation representing breakdown of food and release of energy in the presence of oxygen (aerobic respiration)?	Glucose(with the use of oxygen) ---> Carbon dioxide + water + energy
14.	Define the term anaerobes?	Those organisms which are able to survive in the absence of air (oxygen) are called anaerobes. Eg: Yeast.
15.	What is the equation representing breakdown of food and release of energy in the absence of oxygen (anaerobic respiration) in yeast?	Glucose (without the use of oxygen) ---> Carbon dioxide + alcohol + energy
16.	Breakdown of food releases _____.	Energy.
17.	Why east is used for wine and beer?	East respire anaerobically and during this process yield alcohol. They are, therefore, used to make wine and beer.
18.	Why human muscles resort to anaerobic respiration?	When there is a temporary deficiency of oxygen human muscles resort to anaerobic respiration. During heavy exercise, fast running, cycling, heavy weight lifting e.t.c., the demand for energy is high. But the supply of oxygen to produce the energy is limited. Then anaerobic respiration takes places in the muscle cells to fulfil the demand of energy.
19.	Which organism can survive in the absence of air (oxygen)?	Yeast
20.	What is the equation representing breakdown of food and release of energy in the absence of oxygen (anaerobic respiration) in human muscle?	Glucose(in muscle without the use of oxygen) ---> Lactic Acid + energy