Spindle fibres are made up of:
1. microbodies
2. microfilaments
3. microtubule
4. microfibrils

Yellow fibres are made up of

Microfilament present in cells are made up of

The spindle fibres are made up of _______________ protein. (a) Myoglobin (b) Tubulin (c) Albumin (d) Myosin

Pick up the correct statement : (a) Synapsis of homologous chromosomes occurs during prophase I (b) Division of centromeres takes place during anaphase I (c) Spindle fibres disappear completely in telophase of mitosis (d) Nucleoli may reappear in telophase I

Phragmoplast is precursor of 1. leucoplast 2. chloroplast 3. spindle apparatus 4. cell plate

Which of the following statements are correct and incorrect ? 1. Non-myelinated nerve fibre is enclosed by a schwann cell that does not form a myelin sheath. 2. Synaptic cleft of neurons secrete adrenaline. 3. Spinal cord and cranial nerves are made of non-myelinated nerve fibres.. 4. Myelinated nerve fibres are enveloped with schwann cells, which form a myelinated sheath around the axon.

Ratio of the cross sectional areas of two wires A and B made up of the same material is 1 : 4 . If the Wires are connected across the same potential difference , find the ratio of heat produced in them .

If a seven digit number made up of all distinct digits 8,7,6,4,2,x and y is divisible by 3 then

Consider the following statements sympathetic nervous system is characterised by 1. Acetylcholine as neuro secretion 2. Fight of flight activities 3. Longer preganglionic fibres 4. Non-medullated postganglionic fibres 5. Arising from thoracic-lumbar portion a. 1, 2 and 3 b. 2, 4, and 5 c. 2 and 4 d. 1, 3 and 5

P wave of ECG indicates 1. activation of SA node 2. depolarization of atrial muslces 3. spread of excitation froom AV node ot Purkinje fibres 4. repolarization of atria and depolarization of ventricles