Select the correct option.
1. There are seven pairs of vertebrosternal, three pairs of vertebrochondral and two pairs of vertebral ribs.
2. 8th, 9th and 10th pairs of ribs articulate directly with the sternum.
3. 11th and 12th pairs of ribs are connected to the sternum with the help of hyaline cartilage.
4. Each rid is a flat thin bone and all the ribs are connected dorsally to the thoracic vertebrae and ventrally to the sternum.
Which of the following statements is correct?
1. Cornea consists of dense matrix of collagen and is the most sensitive portion of the eye
2. Cornea is an external, transparent and protective proteinacious covering of the eye-ball
3. Cornea consists of dense connective tissue of elastin and can repair itself
4. Cornea is convex, transparent layer which is highly vascularised
Which part of the brain is responsible for thermoregulation?
1. Medulla oblongata
2. Cerebrum
3. Hypothalamus
4. Corpus callosum
Which of the following glucose transporters is insulin-dependent?
1. GLUT IV
2. GLUT I
3. GLUT II
4. GLUT III
How does steroid hormone influence the cellular activities?
| 1. | Using aquaporin channels as second messenger |
| 2. | Changing the permeability of the cell membrane |
| 3. | Binding the DNA and forming a gene-hormone complex |
| 4. | Activating cyclic AMP located on the cell membrane |
Match the following hormones with the respective disease:
| (a) Insulin | (i) Addison's disease |
| (b) Thyroxin | (ii) Diabetes insipidus |
| (c) Corticoids | (iii) Acromegaly |
| (d) Growth Hormone | (iv) Goitre |
| (v) Diabetes mellitus |
Select the correct option.
(a) (b) (c) (d)
1. (ii) (iv) (i) (iii)
2. (v) (i) (ii) (iii)
3. (ii) (iv) (iii) (i)
4. (v) (iv) (i) (iii)
In some plants, the female gamete develops into embryo without fertilization. This phenomenon is known as:
1. Parthenogenesis
2. Autogamy
3. Parthenocarpy
4. Syngamy
What is the fate of the male gametes discharged in the synergid?
| 1. | One fuses with the egg and the other fuses with central cell nuclei |
| 2. | One fuses with the egg and other(s) degenerate(s) in the synergid |
| 3. | All fuse with the egg |
| 4. | One fuses with the egg and other(s) fuse(s) with the synergid nucleus |
Which one of the following statements regarding post-fertilization development in flowering plants is incorrect?
| 1. | Ovules develop into the embryo sac |
| 2. | Ovary develops into fruit |
| 3. | Zygote develops into an embryo |
| 4. | Central cell develops into endosperm |
Extrusion of the second polar body from egg nucleus occurs:
1. simultaneously with first cleavage
2. after entry of sperm but before fertilization
3. after fertilization
4. before entry of sperm into ovum
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