Cells in G0 phase :
enter the cell cycle
suspend the cell cycle
terminate the cell cycle
exit the cell cycle
Which of the following muscular disorders is inherited?
Muscular dystrophy
Myasthenia gravis
Botulism
Tetany
Select the correct option.
11th and 12th pairs of ribs are connected to the sternum with the help of hyaline cartilage.
Each rib is a flat thin bone and all the ribs are connected dorsally to the thoracic vertebrae and ventrally to the sternum.
There are seven pairs of vertebrosternal, three pairs of vertebrochondral and two pairs of vertebral ribs.
8th, 9th and 10th pairs of ribs articulate directly with the sternum.
Which of the following statements is correct?
Cornea consists of dense connective tissue of elastin and can repair itself.
Cornea is convex, transparent layer which is highly vascularised.
Cornea consists of dense matrix of collagen and is the most sensitive portion the eye.
Cornea is an external, transparent and protective proteinacious covering of the eye-ball.
Phloem in gymnosperms lacks :
Sieve tubes only
Companion cells only
Both sieve tubes and companion cells
Albuminous cells and sieve cells
Use of an artificial kidney during hemodialysis may result in :
(a) Nitrogenous waste build-up in the body
(b) Non-elimination of excess potassium ions
(c) Reduced absorption of calcium ions from gastro-intestinal tract
(d) Reduced RBC production
Which of the following options is the most appropriate?
(b) and (c) are correct
(c) and (d) are correct
(a) and (d) are correct
(a) and (b) are correct
Which of the following statements is incorrect?
Viruses are obligate parasites.
Infective constituent in viruses is the protein coat.
Prions consist of abnormally folded proteins.
Viroids lack a protein coat.
Due to increasing air-borne allergens and pollutants, many people in urban areas are suffering from respiratory disorder causing wheezing due to
inflammation of bronchi and bronchioles
proliferation of fibrous tissues and damage of the alveolar walls
reduction in the secretion of surfactants by pneumocytes.
benign growth on mucous lining of nasal cavity
Which of the statements given below is not true about formation of Annual Rings in trees?
Differential activity of cambium causes light and dark bands of tissue early and late wood respectively.
Activity of cambium depends upon variation in climate.
Annual rings are not prominent in trees of temperate region.
Annual ring is a combination of spring wood and autumn wood produced in a year
C.
Annual rings are not prominent in trees of temperate region.
Growth rings are formed by the seasonal activity of cambium. In plants of temperate regions, cambium is more active in spring and less active in autumn seasons. In temperate regions climatic conditions are not uniform throughout the year. However in tropics climatic conditions are uniform throughout the year.
What is the direction of movement of sugars in phloem?
Upward
Downward
Bi-directional
Non-multidirectional