Biology Chapter 9 Entry test MCQs
126. All of the following can bind to haemoglobin except:
a. H+
b. HCO3–
c. CO2
d. O2
127. O2 pressure in cells or tissues is:
a. 115 mmHg
b. 158 mmHg
c. Less than 60 mmHg
d. Less than 100 mmHg
128. The oxygen content of fresh air is about:
a. 300 ml/liter
b. 200 ml/liter
c. 500 ml/liter
d. 400 ml/liter
129. All of the following facilitates the release of O2 from haemoglobin except:
a. High temperature
b. High CO2 concentration
c. High Acidity
d. High pH
130. In reduced form, hemoglobin carries:
a. Hydrogen ion
b. CO2
c. CO
d. O2
131. Which of the following has maximum oxygen carrying capacity?
a. Myoglobin in sarcoplasm
b. Haemoglobin in erythrocytes
c. Bicarbonate ions in RBCs
d. Globulin in blood plasma
132. About 70-85% CO2 in blood is carried:
a. With proteins in plasma
b. As carboxylase myoglobin
c. As bicarbonate
d. Freely as CO2
133. Carboxyhemoglobin (10-20%) is formed when CO2 combines with:
a. Iron part of hacmoglobin
b. Amino group of haemoglobin
c. Plasma proteins
d. Haem portion of haemoglobin
134. Low partial pressure of oxygen in tissues favors———-of oxyhaemoglobin.
a. Formation
b. Dissociation
c. Transformation
d. Stability
135. Gaseous exchange in animals takes place with the help of process called as:
a. Phagocytosis
b. Active transport
c. Diffusion
d. Cyclosis
Respiratory Volumes and Capacities
136. Tidal volume of lungs is:
a. 1.5 liter
b. 5 liter
c. 3500 ml
d. 0.5 liter
137. The residual volume is:
a. 500 ml
b. 5 liter
c. 3500ml
d. 1.5 liter
138. Inspiratory reserve volume is:
a. 5000 ml
b. 3000 ml
c. 3500 ml
d. 6000 ml
Role of Respiratory Pigments
139. Which of the following is false regarding to haemoglobin?
a. Abundantly found in RBCs
b. It is a globular protein
c. Each haem in haemoglobin can bind to four Os molecules
d. It contains organic haem group and inorganic Fe++
140. Hemoglobin in man increases oxygen carrying capacity by:
a. 90 times
b. 80 times
c. 100 times
d. 75 times
141. The characteristics red color of hemoglobin is due to:
a. u-globin chains
b. Haem
c. Central iron atom
d. B-globin chains
142. What is true about haemoglobin?
a. It is present in dissolved state in blood plasma
b. It is dipeptide and present in RBC
c. It is having haem group
d. It is dipeptide in mammals and localized in RBC
143. Which of the following statement is correct about the respiratory pigments?
a. Myoglobin has more affinity for oxygen as compared to haemoglobin
b. Albumin, globulin and globular proteins are present in respiratory pigments
c. Cyanide and haemoglobin has low affinity for oxygen
d. Myoglobin and haemoglobin has higher affinity for nitrogen
Respiratory Disorders
144. All are respiratory disorders except:
a. Rickets
b. Pulmonary tuberculosis
c. Lungs Cancer
d. Emphysema
145. In heavy smokers, the alveoli become enlarged and damaged which reduces the surface area for the exchange of respiratory gases. This condition is called:
a. Asthma
b. Lung cancer
c. Bronchitis
d. Emphysema
146. Which of the following is a respiratory disorder related to malnutrition?
a. Asthma
b. Cancer
c. Tuberculosis
d. Emphysema
147. Breakdown of thin wall of alveoli occurs in:
a. Cancer
b. Emphysema
c. Asthma
d. T.B
TRANSPORT IN PLANTS
Uptake and Transport of Minerals
148. Active transport is selective and is dependent upon:
a. Transportation
b. Photosynthesis
c. Permeability
d. Respiration
149. The site’s where most of the uptake of water and minerals take place is/are:
a. Underground stem
b. Root hairs
c. Leaves
d. Root cells
150. The roots bear a dense cluster of tiny hair like structures which are extensions of:
a. Endodermal cells
b. Mesodermal cells
c. Epithelial cells
d. Epidermal cells