A centriole-like structure, from which the cilium and the flagellum emerge, is the:

1. Centrosome

2. Basal body

3. Axoneme

4. Vimentin

Centrioles, cilia, flagella, and basal bodies have remarkably similar structural elements and arrangements. This leads us to which of the following as a probable hypothesis?

1. Disruption of one of these types of structure should necessarily disrupt each of the others as well.

2. Loss of basal bodies should lead to loss of all cilia, flagella, and centrioles.

3. Motor proteins such as dynein must have evolved before any of these four kinds of structure.

4. Natural selection for motility must select for microtubular arrays in circular patterns.

The arrangement of outer and central microtubules in a cilium is called the:

1. 9 + 1 pattern

2. 9 + 0 pattern

3. Flagellin pattern

4. 9 + 2 pattern

Identify the correct statement regarding the part of a cell, the structure of which is shown in the given diagram:

Match each item in Column I with one item in Column II and chose your answer from the codes given below.

Codes:

                I            II            III

1.             1            2             3 

2.             2            3             1

3.             2            1             3

4.             3            2             1

The motile bacteria are able to move by

1. fimbriae

2. flagella

3. cilia

4. pili

Which of the following statements regarding cilia is not correct ?

1. The organized beating of cilia is controlled by fluxes of Ca²⁺ across the membrane

2. Cilia are hair-like cellular appendages

3. Microtubules of cilia are composed of tubulin

4. Cilia contain an outer ring of nine doublet microtubules surrounding two single

microtubules

Bacterial flagella is composed of

(1)basal body, Hook, filament

(2) basal body and filament

(3)  Hook and filament,

(4)Hook, filament and base

Cilia and flagella are

(1)microtubule

(2)microfilament

(3)intermediate filament

(4)Both A and B

Which of the following is not true about cilia and flagella

(1)Both help in locomotion

(2)cilia is shorter and flagella is longer

(3)Flagella works like Oars

(4)hair-like outgrowths of the cell membrane