Life Processes Test - 15

In photosynthesis, the light-dependent reaction takes place on the thylakoid membranes. Stacks of thylakoids are known as grana. The inside of the thylakoid membrane is called the lumen and outside the thylakoid membrane is the stroma, where the light-independent reactions take place.

Lipids (fats and oils) get digested with the help of lipase enzyme and gives fatty acids and glycerol as a product.

Green light is the least effective for plants because they are themselves green due to the pigment Chlorophyll. This pigment absorbs red light the best and converts the light into energy that it uses for metabolism. Photosynthesis occurs when pigments (chlorophyll) molecules in the plant cell absorb light photons and transfer them around to create chemical energy. Different colour light helps plants achieve different goals as well. Blue light, for example, helps encourage vegetative leaf growth. Red light, when combined with blue, allows plants to flower.

Cystic duct leads bile from the liver into the gall bladder.

The cystic duct connects the top of the gallbladder's neck to the common hepatic duct. It then joins the common bile duct, which meets pancreatic duct before it empties into the duodenum (first section of the small intestine). In the average adult, the cystic duct measures four centimeters in length.

It is different for everyone but considering an average an adult respiratory rate is 15 to 18 breaths per minute, but respiration rate under 12 or over 25 breaths per minute while resting is considered abnormal. Newborns can have breathing rates of up to 50 breaths per minute, but by the time a child reaches 12 years of age, the normal range is 18 to 30 breaths per minute. And after it comes to near 15 to 20 approx.

Nitrogen is a component of amino acids and urea. Amino acids are the building blocks of all proteins. So, N is essential for the formation of protein.

Wind velocity doesn't affect the photosynthesis. Unlike light intensity, CO₂ concentration, and temperature which are the major factors influencing the rate of photosynthesis, the wind has no effect on the reactions and the rate of reactions going in the chloroplast of the leaves of the plant.

Carbon dioxide and nitrogen wastes transported through blood by dissolving in plasma in water soluble simpler molecular form, as CO₂ can dissolve with the nitrogen wastes or bind easily with the plasma proteins.

Renal vein contains less nitrogenous waste as Renal artery brings oxygenated blood to the kidneys from the aorta which arises out of heart, Pulmonary artery and vein also carries blood from heart to lungs and lungs to heart respectively but this blood is not pure and has nitrogenous waste in it while renal vein carries deoxygenated but filtered blood to the heart from where it is again pumped to the entire body.