The cell -mediated immunity inside the human body is carried out by
T- lymphocytes
B - lymphocytes
thrombocytes
thrombocytes
A.
T- lymphocytes
T - lymphocyte receptors can recognise the only antigen that bound to cell membrane proteins these lymphocytes mediates CMI (cell-mediated immunity). B - lymphocytes are the major effector molecules of humoral immunity. Erythrocytes are red blood cells. Thrombocytes or platelets secrete factors that are involved in the vascular repair.
The three boxes in this diagram represent the three major biosynthetic pathways in aerobic net reactant or products
Arrows numbered 4, 8 and 12 can all be
NADH
ATP
H2O
H2O
Select the correct statement with respect to locomotion in humans
A decreased level of progesterone cause osteoporosis in old people
Accumulation of uric acid crystals in joints causes their inflammation.
The vertebral column has 10 thoracic
The vertebral column has 10 thoracic
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 |
|
Cytokinesis |
Cell plate formed, Mitochondria distributed between two daughter cells |
The eyes of Octopus and eyes of cat show different patterns of structure, yet they perform a similar function. This is an example of
homologous organs that have evolved due to convergent evolution
homologous organs that have evolved due to divergent evolution
analogous organs that have evolved due to convergent evolution
analogous organs that have evolved due to convergent evolution
A pregnant female delivers a baby, who suffer from stunted growth, mental retardation low intelligence quotient and abnormal skin. This is the result of
deficiency of iodine in diet
low secretion of growth hormone
cancer of the thyroid glad
cancer of the thyroid glad
A senentary sea anemone gets attached to the shell lining of hermit crab. The association is
ectoparasitism
symbiosis
commensalism
commensalism
The characteristics and an example of a synovial joint in humans is
|
Characteristics |
Examples |
|
Fluid cartilage between two bones, limited movements |
Knee joints |
|
Characteristics |
Examples |
|
Fluid filled between two joints, provides cushion |
Skull bones |
|
Characteristics |
Examples |
|
Fluid filled synovial cavity between two bones |
Joint between atlas and axis |
|
Characteristics |
Examples |
|
Fluid filled synovial cavity between two bones |
Joint between atlas and axis |
Which of the following statement is correct in relation to the endocrine system?
Adenohypophysis is under the direct neural regulation of the hypothalamus.
Organs in the body like gastrointestinal tract, heart, kidney and live
Non-nutrient chemicals produced by the body in trace amount that acts as intercellular messengers are known as hormones.
Non-nutrient chemicals produced by the body in trace amount that acts as intercellular messengers are known as hormones.
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
Golgi apparatus, formation of glycolipids
