Life Processes

Which one of the following cell organelles contain the light- absorbing green pigment chlorophyll?
1. Mitochondria
2. Ribosomes
3. Chloroplast
4. Nucleolus
The opening and closing of stomata is regulated by:
1. Lenticel
2. Guard cells
3. Sieve cells
4. All
Which one of the following statements is correct?
Statement 1: In aerobic respiration, 38 molecules of ATP are produced by complete oxidation of one gram-mole of glucose.
Statement 2: In anaerobic respiration only 2 molecules of ATP are formed.
1. Statement 1
2. Statement 2
3. Both the statement are correct
4. Both the statement are incorrect
Which of the following acids is the end product of Fermentation?
1. Lactic acid
2. Hydrochloric acid
3. Citric acid
4. Pyruvic acid
What is the function of blood?
1. Transportation of respiratory gases
2. Regulation of body temperature.
3. Transportation of waste products.
4. All the above
One complete contraction and relaxation of the heart is called:
1. Systole
2. Diastole
3. Heart Beat
4. Blood pressure
The final product of glycolysis is:
1. Glucose
2. Pyruvate
3. Ethanol
4. Lactic acid
Which one of the following statements is true?
Statement 1: Kidneys lie in the abdominal cavity.
Statement 2: Ureters carry urine from the kidneys to the urinary bladder.
1. Statement 1
2. Statement 2
3. Both statements are correct
4. Both statements are incorrect
The heart is enclosed in a double- walled sac called:
1. Placenta
2. Pericardium
3. Pleura
4. Bladder
Which one of the following is not present in the gastric juice secreted by stomach?
1. Pepsin
2. Hydrochloric acid
3. Mucus
4. Bile
The site of photosynthesis in a cell of the leaf is:
1. Carotenoid
2. Chloroplast
3. Root
4. Xylem
The part of tooth containing nerves and blood vessels is known as:
1. Dentine
2. pulp
3. Enamel
4. Villi
Which enzyme converts starch into sugar present in saliva?
1. Pepsin
2. Hydrochloricacid
3. Amylase
4. insulin
Which of the following statements is correct?
1. Energy produced during respiration is stored in the form of ATP in animals
2. ADP has a high energy content as compared to ATP.
3. Respiration is just same as photosynthesis.
4. All the above
Lenticels are present in :
1. Roots of small herbaceous plants.
2. Sterns of large plants and trees
3. Leaves of small herbaceous plants
4. All the above
Which of the following animals uses its cell membrane for respiration?
1. Earthworm
2. Planaria
3. Amoeba
4. Both b & c
Plants continually grow due to ____ in stem and root tips.
1. Meristem
2. Guardcell
3. Xylem
4. Root nodules
Which of the following is not a part of phloem tissue?
1. Sieve-tube cells
2. Companion cells
3. Tracheids
4. All
Haemoglobin has maximum affinity for which of the following gases?
1. Carbon monoxide
2. Carbon dioxide
3. Oxygen
4. Nitrogen
Translocation is:
1. Continuous evaporation of water from the cells of a leaf
2. Transport of food from the leaves
3. Binding of carbon monoxide with haemoglobin
4. Diffusion of carbon dioxide into the blood
Which of the following is correct statement?
1. The blood pressure of a person is expressed in terms of mm Hg.
2. The maximum pressure at which the blood leaves the heart through the aorta during contraction phase, is called the diastolic pressure
3. The minimum pressure in the arteries during the relaxation phase of heart is called the systolic pressure.
4. All the above
Which one of the following organisms does not have double circulation of blood in heart?
1. Dog
2. Fish
3. Lizard
4. Monkey
Which of the following statements is correct?
1. The upper two chambers of human heart are called ventricles
2. The lower two chambers of human heart are called atriums.
3. The chambers of the heart are separated by a partition called pericardium.
4. The pulmonary artery carries deoxygenated blood from the right ventricle the lungs.
Which metal is associated with haemoglobin?
1. Copper
2. Iron
3. Aluminium
4. None
The instrument through which blood pressure is measured is known as :
1. Anemometer
2. Sphygmomanometer
3. Barometer
4. Ammeter
Which of the following is not present in the lymph?
1. Protein molecules
2. Digested fats
3. Red Blood cells
4. Fragments of dead cells

Life Processes

Quiz