31.

The Golgi complex plays a major role

• in trapping the light and transforming it into chemical energy

• in digesting proteins and carbohydrates

• as energy transferring organelles

• in post translational modification of proteins and glycosidation of lipids

Which one of the following organelle in the figure correctly matches with its function?

• Rough endoplasmic reticulum, formation of glycoproteins

• Golgi apparatus, protein synthesis

• Golgi apparatus, formation of glycolipids

• Rough endoplasmic reticulum, protein synthesis

Macromolecule chitin is

• nitrogen containing polysaccharide

• phosphorus containing polysaccharide

• sulphur containing polysaccharide

• simple polysaccharide

The essential chemical components of many coenzymes are

• proteins

• nuclei acids

• carbohydrates

• vitamins

A stage in cell division is shown in the figure. Select the answer which gives correct identification of the stage with its characteristics

• Telophase - Nuclear envelope reforms, Golgi complex reforms

• Late anaphase - Chromosomes move away from equatorial plate, Golgi complex not present

• Cytokinesis - Cell plate formed, mitochondria distributed between two daughter cells

• Telophase - Endoplasmic reticulum and nucleolus not reformed yet

Select the correct match of the digested products in humans given in column I with their absorption site and mechanism in column II.

• Column I	Column II
  Glycine and glucose	Small intestine and active absorption

• Fructose and Na+

  Small intestine passive absorption

• Glycerol and fatty acids

  Duodenum and move as chilomicrons

• Cholesterol and maltose

  Large intestine and active absorption

The figure shows a diagrammatic view of human respiratory system with labels A, B, C and D. Select the option, which gives correct identification and main function and/or characteristic.

• A - trachea - long tube supported by complete cartilaginous rings for conducting inspired air

• B - pleural membrane-surround ribs on both sides to provide cushion against rubbing

• C - alveoli - thin walled vascular bag-like structures for exchange of gases

• D - lower end of lungs - diaphragm pulls it down during inspiration

Figure shows schematic plan of blood circulation in human with labels - A to D. Identify the label and give its function/s.

• A - pulmonary vein - takes impure blood from body parts, pO₂ = 60 mmHg

• B - pulmonary artery - takes blood from heart to lungs, pO₂ = 90 mmHg

• C - vena cava - takes blood from body parts to right auricle, pCO₂ = 45 mmHg

• D - dorsal aorta - takes blood from heart to body parts, pO₂ = 95 mmHg

The diagram given here is the standard ECG of a normal person. The P - wave represents the

• contraction of both the atria

• initiation of the ventricular contraction

• beginning of the systole

• end of systole

Figure shows human urinary systemwith structures labelled A to D. Select option, which correctly identifies them and gives their characteristics and/of functions

• A - adrenal gland - located at the anterior part of kidney. Secrete catecholamines, which stimulate glycogen breakdown

• B - pelvis - broad funnel shaped space inner to hilum, directly connected to loops of Henle

• C - mediulla - inner zone of kidney and contains complete nephrons

• D - cortex - outer part of kidney and do not contain any part of nephrons