Question

True or False (provide short explanation)

1. One of your friends lost 7 kg of fat following a strict and exhausting diet
some exercice. This fat has been converted into ATP which weighs much less than fat.

2. The adhesion molecules on the surface of cells form transient links between cells, while cell junctions like tight junctions form permanent links between two cells.

3. Each time the genome is replicated, half of the newly synthesized DNA is made up of Okazaki fragments linked together.

4. The cotransport of Na + and another solute inside the cell, using energy
created by the Na + gradient, is an example of active primary transport.

5. If I isolate the nucleus of a carrot cell and inject this nucleus into the egg of a frog in which the nucleus has been removed. Will the frog oocyte be reprogrammed to produce a carrot?

Answer 1

Ans. (1) True

Because the mitochondria in muscle or liver, put fat from fat cell through a metabolic process .This converts the fat into heat, carbon dioxide, water and ATP.

Ans. (2) True

The Transient adhesive interactions are mediated by activation - induced transcription- dependent expression of E - or P - selectin on the endothelial cell surface.

Ans. (3) True

Because DNA polymerase can only synthesise DNA in a 5' to 3' direction, the other new strand put together in short pieces called Okazaki fragments.

Ans. (4) True

Sodium (Na +) is a commonly co - transportion across the plasma membrane, whose electrochemical gradient is then used to power the active transport of second ion or molecule against its gradient.

Ans. (5) False