Life Processes

Consider the following statements:
1. The dialysing fluid has high osmotic pressure compared to blood and it is devoid
of nitrogenous wastes.
2. The dialysis is similar to the function of the kidney, but it is different since there
is no reabsorption involved.
Which of the following statements is/are correct?

The basic filtration unit in kidneys is

Consider the following statements:
1. The translocation in phloem is achieved by simple physical forces.
2. Material like sucrose is transferred into phloem tissue using energy from ATP.
Which of the following statements is/are correct?

Consider the following statements:
1. In xylem tissue, vessels, sleve tubes and tracheids of the roots, stems and leaves
are interconnected to form a continuous system of water-conducting channels
reaching all parts of the plant.
2. The transport of soluble products of photosynthesis is called translocation and it
occurs in the part of the vascular tissue known as phloem.
Which of the following statements is/are correct?

Consider the following statements:
1. The transpiration helps in the absorption and upward movement of water and
minerals dissolved in it from roots to the leaves.
2. During the day when the stomata are open, root pressure becomes the major
driving force in the movement of water in the xylem.
Which of the following statements is/are correct?

The loss of water in the form of vapour from the aerial parts of the plant is known as

Consider the following statements:
1. Lymph is similar to the plasma of blood but colourless and contains less protein.
2. Lymph caries digested and absorbed fat from liver and drains excess fluid from
extra cellular space back into the blood.
Which of the following statements is/are correct?

Consider the following statements:
1. Arteries are the vessels which carry blood away from the heart to various organs
of the body.
2. Veins have thick, elastic walls to ensure that the blood flows only in one
direction.
Which of the following statements is/are correct?

Consider the following statements:
1. The blood pressure is much greater in veins than in arteries.
2. High blood pressure is also called hypertension and is caused by the constriction
of arterioles.
Which of the following statements is/are correct?

The blood in human beings transports
1. Carbon-Dioxide
2. Oxygen
Which of the following statements is/are correct?

Consider the following statements:
1. During the breathing cycle, when alr is taken in and let out, the lungs always
contain a residual volume of air so that there is sufficient time for oxygen to be
absorbed and for the carbon dioxide to be released.
2. Carbon dioxide is less soluble in water than oxygen and hence is mostly not
transported in the dissolved form in blood.
Which of the following statements is/are correct?

Consider the following statements:
1. Breakdown of pyruvate in the absence of air (oxygen) takes place in
mitochondria.
2. Glucose is breakdown into a three-carbon molecule called pyruvate in the
cytoplasm.
Which of the following statements is/are correct?

Consider the following statements:
1. The food coming from the stomach to small intestine is acidic in nature.
2. The pancreas secretes pancreatic juice which contains enzymes like pepsin and
mucus.
3. The gastric glands in stomach release enzymes like trypsin for digesting proteins
and lipase for breaking down emulsified fats.
Which of the following statements is/are correct?

Consider the following statements:
1. The small intestine is the site of the complete digestion of carbohydrates,
proteins and fats.
2. Herbivores eating grass need a shorter small intestine to allow the cellulose to
be digested whereas carnivores like tigers have a longer small intestine.
Which of the following statements is/are correct?

The breakdown of pyruvate to give carbon dioxide, water and energy takes place in

Consider the following statements:
1. The opening and closing of the pore in leaves is a function of the Stomata.
2. Desert plants take up oxygen at night and prepare an intermediate which is acted
upon by the energy absorbed by the chlorophyll during the day.
3. Stomata helps in the exchange of gases across the surface of stems, roots and
leaves as well.
Which of the following statements is/are correct?

Consider the following statements:
1. In Amoeba, the cell has a definite shape and food is taken in at a specific spot.
2. Paramecium takes in food using temporary finger-like extensions of the cell
surface which fuse over the food particle forming a food-vacuole.
Which of the following statements is/are correct?

Consider the following statements:
1. The internal energy reserve for plants is starch and for human beings is glycogen.
2. Carbon and energy requirements of the autotrophic organism are fulfilled by
photosynthesis.
Which of the following statements is/are correct?

Consider the following statements:
1. The maintenance function of living organisms is continuous in nature.
2. Life on earth depends on carbon based molecules; most of these food sources
are also carbon-based.
Which of the following statements is/are correct?

Consider the following statements:
1. During the process of respiration, organic compounds such as glucose are broken
down to provide energy in the form of ATP.
2. Anaerobic respiration makes more energy available to the organism.
3. In human beings, the transport of materials such as oxygen, carbon dioxide, food
and excretory products is a function of the circulatory system.
Which of the following statements is/are correct?