9th Class Biology: chapter 7 Bioenergetics Short Questions Answer
9th Class Biology: chapter 7 Bioenergetics Short Questions Answer
We are providing all Students from 5th class to master level all exams preparation in free of cost. Now we have another milestone achieved, providing all School level students to the point and exam oriented preparation question answers for all science and arts students.
After Online tests for all subjects now it’s time to prepare the next level for Punjab board students to prepare their short question section here. We have a complete collection of all classes subject wise and chapter wise thousands questions with the right answer for easy understanding.
Here we are providing complete chapter wise Biology questions and Answers for the 9th class students. All the visitors can prepare for their 9th class examination by attempting below given question answers.
In this List we have included all Punjab boards and both Arts and Science students. These Boards students can prepare their exam easily with these short question answer section
Lahore Board 9th classes short questions Answer
Rawalpindi Board 9th classes short questions Answer
Gujranwala Board 9th classes short questions Answer
Multan Board 9th classes short questions Answer
Sargodha Board 9th classes short questions Answer
Faisalabad Board 9th classes short questions Answer
Sahiwal Board 9th classes short questions Answer
DG Khan Board 9th classes short questions Answer
Bahwalpur Board 9th classes short questions Answer
All above mention Punjab Boards students prepare their annual and classes test from these online test and Short question answer series. In coming days we have many other plans to provide all kinds of other preparation on our Gotest website.
How to Prepare Punjab Board Classes Short Question Answer at Gotest
- Just Open the desired Class and subject which you want to prepare.
- You have Green bars which are Questions of that subject Chapter. Just click on Bar, it slides down and you can get the right answer to those questions.
- You can also Rate those question Answers with Helpful or not to make it more accurate. We will review all answers very carefully and also update time to time.
Now you can start your preparation here below
Such reactions which need light for their completion are called light-dependent reactions.
Organisms utilize oxygen for the breakdown of C-H bonds present in the food in their cells. This breakdown yields energy which is transformed into ATP. During this process the C-H are broken by oxidation- reduction reaction and so carbon dioxide and water are also produced. The cellular energy-yielding process is called cellular respiration.
ATP stand for adenosine triphosphate.
As carbon dioxide concentration rises, the rate o photosynthsisi goes on increasing until limited by other factors. Increase in carbon dioxide concentration beyond a certain level causes the closure of stomata and it decreases the rate of photosynthesis.
The rate of photosynthesis varies with light intensity. It decreases as the light intensity decreases and increases as the intensity increases. However at much higher light intensity, the rate of photosynthesis becomes constant.
Aerobic respiration: They type of respiration which occurs in the presence of oxygen is called Aerobic respiration.
Anaerobic Respiration: That type of respiration which take place in absence of oxygen is called anaerobic respiration.
Oxidation: The loss of electrons is called oxidation.
Reduction: The gain of electrons is called reduction.
Alcoholic fermentation occurs in bacteria yeast etc. In this type pyruvic acid is further broken down into alcohol and CO2.
Photosynthesis is the synthesis of glucose with oxygen as a by-product from carbon dioxide and water in the presence of sunlight and chlorophyll. All life depends on photosynthesis.
The major energy currency of all cells is a nucleotide called adenosine triphosphate.
The major energy currency of all cells is a nucleotide called adenosine triphosphate.
Discovery of ATP: ATP was discovered in 1929 by karl lohmann, and was proposed to be the main energy-transfer molecule in the cell by the Nobel prize winner, Fritz Lipmann in 1941.
Flavin adenine dinucleotide FAD is a co-enzyme.
NAD stands or Nicotine-amide adenine dinucletide. A co-enzyme used in oxidation-reduction reactions.
Pigment are the substances that absorb visible light. Different pigments absorb light of different wavelengths. The photosynthetic pigments are organized in the form of clusters, called photosystems, in thylakoid membranes of chloroplasts.
The process in which pyruvic acid molecules are completely oxidized, along with the formation of ATP, NADH and FADH2 is known as kreb cycle.
Sun light energy is absorbed by chloroplyll. It is then converted into chemical energy, which drives the photosynthetic process only one percent of light falling on leaf surface is absorbed, the rest is reflected or transmitte.
Light rays of different wave lengths are not only differently absorbed by photosynthetic pigments but are also differently effective in photosynthesis. The blue and red lights carry out more photosynthesis.
The environmental factor whose deficiency or absence decrease the rate of metabolic reaction is called limiting factor.
Following are limiting factors in photosynthesis light intensity, temperature and concentration of CO2.
Bradk down of glucose molecule is called glycolysis.
This process is occur in cytoplasm.
Those substance which absorb visible light are called pigments. Photosynthetic pigments are organized in the form of cluster known as photosystems. Chlorophyll is main photosynthetic pigment all these are used to absorb visible light which run the process of photosynthesis.
ATP is called energy currency of cell. Each ATP molecules has three parts. A adenine a double ringed nitrogenous base. A ribose five carbon sugar and three phosphate group in linear chain.
The major energy currency of all cells is nucleotide called adenosine triphosphate.
It’s main function is to store energy.
The series of reaction in photosynthesis, which occur in absence of light is called dark reaction.
Chemical equation for aerobic respiration is:
C6H12O6+602……………………… 6CO2 + 12H2O+ Energy
