5.9 Centrosome and Centrioles

Question 1

______ is an organelle usually containing two cylindrical structures called ______.

Answer 1

Centrosome; Centrioles

Question 2

Centrosomes are surrounded by

Answer 2

amorphous pericentriolar material

Question 3

Both the Centrioles lie ______ (parallel/perpendicular) to each other, which has an organization like a ______.

Answer 3

perpendicular; Cartwheel

Question 4

Centrioles are made up of 9 ______ (even/uneven) spaced peripheral fibrils of ______ protein.

Answer 4

nine; tubulin protein

Question 5

In centriole, each of the peripheral fibrils is a doublet.
T/F

Answer 5

False,
Triplet

Question 6

In centriole, the adjacent triplets are not linked.
T/F

Answer 6

False,
they are linked

Question 7

The proteinaceous and central part of proximal region of the centriole is called ______.

Answer 7

hub

Question 8

Hub is connected with tubules of peripheral triplets by

Answer 8

radial spokes

Question 9

Hub and radial spokes are made of:

Answer 9

Protein

Question 10

Centrioles form:

Answer 10

I. Basal body of Cilia or Flagella
II. Spindle fibers

Question 11

The centrioles make spindle apparatus during ______ in animal cells.

Answer 11

cell division

Question 12

The number of microtubules in a centriole is:

Answer 12

27 (9 triplets)