Biology Test 13...

Which organelle acts as a pressure vessel?

Which of the following statements is/are false?

(a) In only about 90 minutes, yeast can progress through the cell cycle.

(b) The M-phase lasts more than 95% of the duration of the cell cycle.

(c) During interphase, the cell undergoes both cell growth and DNA replication.

During cell enlargement phase of growth, molecules of new cell wall material are inserted between the original molecules of stretched wall. This process is known as ____________.

Which of the following enzymes is used to dissolve blood clots in a heart attack?

Glisson's capsule is the covering of:

Vegetal hemisphere in frog's egg in the water remains_____

Which of the following statements is/are false?

a. The peripheral region of the secondary xylem is lighter in color and is known as the heartwood.

b. The springwood is lighter in color and has a lower density whereas the autumn wood is darker and has a higher density.

c. Sapwood is involved in the conduction of water and minerals from the root to the leaf.

The nitrogenous base which is not present in DNA structure is

In plants, bulk flow is the movement of substances in bulk or in masses from one point to another. In which of the following ways can it be achieved?

(a) Positive hydrostatic pressure gradient

(b) Negative hydrostatic pressure gradient

(c) Positive concentration gradient

Red biotechnology is the term used to address