Cell Biology Te...

A number of different materials may be deposited in the cell wall. Which of the following reduces the water content of the wall matrix and increases its hardness?

Passage of substances across biomembranes occurs by passive, active and bulk transport. Which of the following statements about passive transport is true?

Which of the following forms of endoplasmic recticulum is/are flat, interconnected sac-like parts which are 40-50 nm in diameter and occur in the cells actively involved in synthetic activity?

a. Cisternae
b. Vesicles
c. Tubules

Depending upon morphology and function, there are four types of lysosomes. Which of the following types of lysosomes is formed by the fusion of food containing phagosome with lysosome?

This is the correct option. Secondary lysosome is formed by the fusion of food containing phagosome with lysosome. As the digestion occurs, the digested food is passed out into the cytoplasm and the secondary lysosome is left with undigested food.

Consider the following statements and answer accordingly:

a. In a mitochondrion, outer chamber is the space that lies between the outer and the inner membranes of the mitochondrial envelope.
b. Mitochondria synthesise some of their own structural proteins.

Depending upon their colour, plastids are of three main types. Which of the following are colourless plastids that generally occur near the nucleus of non-green cells and possess internal lamellae?

a. Leucoplasts
b. Chromoplasts
c. Chloroplasts

A cell contains a number of organelles with similarities and dissimilarities. Which of the following is a similarity between mitochondria and chloroplasts?

Consider the following statements and answer accordingly:

a. The protistan Paramecium caudatum has two nuclei, macronucleus for controlling metabolic activities of organism and micronucleus possessing hereditary information.
b. Nucleus is suspended in central vacuole by cytoplasmic strands in Spirogyra.

Which of the following is the hair-like projecting part of flagellum or cilium, the length of which is 5-20 μm in case of cilium and 100-200 μm in case of flagellum?