MEDIUM
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Giant chromosomes were discovered by E. Balbiani with having thousands of DNA strands called chromosomal puffs. These puffs are

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Important Questions on Molecular Basis of inheritance

EASY
The chromosomes in which centromere is situated close to one end are:
MEDIUM

Mitochondria and chloroplast are:

(i) Semi - autonomous organelles

(ii) Formed by the division of pre-existing organelles and they contain DNA but lack protein synthesizing machinery

Which one of the following option is correct?

EASY
Water-soluble pigments found in plant cell vacuoles are:
EASY

Fill up the blanks with suitable words, respectively. 

Each chromosome has a ____ or _____ on the sides, disc shaped structure is called _____. The _____ chromosome has two equal arms, ____ chromosome has one shorter and one long arm. _____ chromosome has no second arm. The secondary constriction develop small fragment called ______

A) metacentric
B) telocentric
C) centromere
D) primary constriction 

E) submetacentric
F) satellite
G) kinetochore

EASY
Which one of the following cell organelles are enclosed by a single membrane?
MEDIUM
Microtubules are the constituents of:
EASY
Cellular organelles with membranes are:
MEDIUM

Match List - I with the List - II.

  List - I   List - II
(a) Metacentric chromosome (i) Centromere situated close to the end forming one extremely short and one very long arms
(b) Acrocentric chromosome (ii) Centromere at the terminal end
(c) Sub-metacentric (iii) Centromere in the middle forming two equal arms of chromosomes
(d) Telocentric chromosomes (iv) Centromere slightly away from the middle forming one shorter arm and one longer arm

Choose the correct answer from the options given below:

EASY

Match the following?

Chromosomes Centromere Chromatids
(a) Metacentric (i) Nearer to one end (p) Extremely short and long
(b) Telocentric (ii) Middle (q)  One arm
(c) Submetacentric (iii) Close to its end (r) Two equal arms
(d) Acrocentric (iv) Terminal (s) One short one long

 

EASY

Identify the part labelled as ‘M’ in the diagram given below:

Question Image

EASY
Which of the following are not membrane-bound?
MEDIUM
Match the columns and identify the correct option.
 
  Column I   Column II
A Thylakoids (i) Disc-shaped sacs in Golgi apparatus
B Cristae (ii) Condensed structure of DNA
C Cisternae (iii) Flat membranous sacs in stroma
D Chromatin (iv) Infoldings in mitochondria
EASY
The structures that are formed by stacking of organized flattened membranous sacs in the chloroplasts are:
EASY
The region of chromatin that is stained lightly is
EASY
When the centromere is situated in the middle of two equal arms of chromosomes, the chromosome is referred as:
EASY
The shorter and longer arms of a submetacentric chromosome are referred to as: