Life Processes Test - 50

Chemical energy is stored in the bonds of glucose. During the process of respiration (aerobic respiration), the glucose molecule is broken down to release carbon dioxide, water, and energy. This process releases the energy of glucose which is then stored as energy in ATP molecules. ATP molecules are the 'energy currencies of the cell'.
So, the correct answer is option A.

• Humans have double circulation. The blood pumped by the right ventricle enters the pulmonary artery, whereas the left ventricle pumps blood into the aorta. 
• The deoxygenated blood pumped into the pulmonary artery is passed onto the lungs from where the oxygenated blood is carried by the pulmonary veins into the left atrium. 
• This pathway constitutes the pulmonary circulation. 

Respiration is a metabolic process through which, living organisms store and release energy in the form of ATP by taking up oxygen and releasing out carbon dioxide. 

Correct Answer: D

Cellular respiration is defined as a set of metabolic reactions and processes that take place in the cells of organisms. These reactions and processes convert chemical energy from oxygen molecules or nutrients into adenosine triphosphate (ATP) and then release waste products.

The glucose molecule is the primary fuel for cellular respiration. Without it, the entire process would not be able to start as there would be no pyruvate to initiate Kreb's cycle (second step in cellular respiration).

Hence, the correct answer is option C.

In soil, the minerals can be present dissolved in soil solution or adsorbed on charged clay particles. Plants obtain minerals both from the soil solution (through absorption) as well as directly from clay particles (through ion exchange mechanisms). 

Blood pressure is the pressure of the circulating blood against the walls of the arteries, the veins, and the chambers of the heart. The blood pressure in the large artery of the heart, the aorta, and the other large arteries of a healthy adult is usually 120 mm Hg during the contraction of the heart (systole), and 80 mm Hg during relaxation of the heart (diastole). Normal blood pressure is less than 120/80 mm Hg. So, the correct answer is-120/80 mm Hg.

In a normal human, the amount of blood pumped by the heart per minute is 5 litres. It can be calculated based on the heart rate which is defined as heartbeats per minute (72 beats a minute) and a stroke volume which is defined as the volume of blood pumped by one ventricle with each heartbeat (which is 70 ml per beat). Therefore, the average amount of blood pumped by the heart = 70*72 ml =~5 litres. 

Thus, the correct answer is option B.

Wall of the left ventricle is thicker as compared to right ventricle as it has to pump the blood to greater distances and the systolic pressure is extremely high in left ventricles.