Question contain STATEMENT-1 (Assertion) and STATEMENT-2 (Reason).Question has 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct.
Statement 1 :DNA is associated with proteins.
Statement 2 :DNA binds around his tone proteins that form a pool and the entire structure is called a nucleosome

Statement- 1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement -1
Statement -1 is True, Statement -2 is True ; Statement-2 is NOT a correct explanation for Statement - 1
Statement - 1 is True, Statement- 2 is False
Both the statements are false.

Solution

A chain of DNA has 140 base pairs, make 3¹/₄ turns and twist around a histone octamer forming nucleosome. The core of nucleosome consists of 4 histones H₂A, H₂B, H₃and H₄

Question contain STATEMENT-1 (Assertion) and STATEMENT-2 (Reason).Question has 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct.
Statement 1 :Mitochondria and chloroplasts are semiautonomous organelles.
Statement 2 :They are formed by division of pre-existing organelles as well as contain DNA but lack protein synthesizing machinery

Statement- 1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement -1
Statement -1 is True, Statement -2 is True ; Statement-2 is NOT a correct explanation for Statement - 1
Statement - 1 is True, Statement- 2 is False
Both the statements are false.

Solution

Mitochondria and chloroplasts both are double membrane organelles. They are semi autonomous as both their structrue and functions are partially controlled by nucleus of the cell and partially themselves. Both possess their own DNA and arises from pre-existing cells.Synthesis of many amino acids occurs in mitochondria.The first formed amino acids are glutanic acid and aspartic acid.

Also plastid manufactures some of its own proteins,enzymes and other chemicals because of the presence of 70S ribosomes which can help translate the coded in formation contained in mRNAs transcribed over chloroplast DNA.DNA replication is the process of forming carbon copy of DNA. Whereas transcription is the formation of RNA over DNA template.

Which is not the function of cell wall?
I.Provides shape to the cell
II.Protects the cell from mechanical damage and infection
III.Helps in cell to cell interaction
IV.Provides barrier to undesirable macro molecules

Only V
Only IV
Only II, IV and V
None

Read the following statements and identify the correct options given
I.The shape of the cells may vary with the function they perform
II.Human RBC is about 7.0 mm in diameter
III.Cytoplasm is the main arena of cellular activities
IV.Various chemical reactions occur in cytoplasm to keep the cell in the living state

All are correct
Only I and II are correct
Only IV is correct
All are wrong

Read the following statements and identify the correct options given
I.Sap vacuoles-contain digestive enzymes with the help of which nutrients are digested.
II.Contractile vacuoles – take part in osmoregulation and excretion
III.Food vacuoles – store and concentrate mineral salts as well as nutrients
IV.Air vacuoles– store metabolic gases and help in buoyancy of cells.

I and II are correct
I and III are correct
II and IV are correct
I and IV are correct

Match Column I with Column II

Column I	Column II
A.Endoplasmic reticulum	1.Stack of cisternae
B.Spherosome	2.Storeoils or fats
C.Dictyosomes	3.Synthesis and storage of lipids
D.Peroxisome	4.Photorespiration
E.Elaioplasts	5.Detoxification of drugs

A→(5); B→(3); C→(l); D→(4); E→(2)
A→(5); B→(3): C→(2); D→(4); E→(l)
A→(2); B→(3); C→(l); D→(4); E→(5)
A→(3); B→(3); C→(l); D →(5); E→(2)

Match Column I with Column II

Column I	Column II
A.Sap vacuole	1.Contain digestive enzyme
B.Contractile vacuole	2.Store metabolicgases
C.Food vacuole	3.Osmoregulation
D.Air vacuole	4.Store lipids
E.Sphaerosomes	5.Store and concentrate mineral salts & nutrients

A→(5); B→(3); C→(l); D→(2); E→(4)
A→(2); B→(3); C→(4); D→(5); E→(l)
A→(5); B→(2); C→(3); D→(l); E→(4)
A→(5); B→(3); C →(2); D→(4); E→(l)
A→(4); B→(l); C→(3); D→(5); E→(2)

Match the components A, B, C, D and E in the diagram (cell membrane) below from the list (i) to (vii)

(i)Sugar
(ii)Protein
(iii)Lipid bilayer
(iv)Integral protein
(v)Cytoplasm
(vi)Cell wall
(vii)External protein

A - (i), B - (ii), C - (iii), D - (iv), E - (v)
A - (ii), B - (i), C - (iii), D - (iv), E - (v)
A - (i), B - (ii), C - (iii), D - (iv), E - (vi)
A - (i), B - (ii), C - (iii), D- (vii), E- (v)

The section view of a mitochondrion showing the different parts.

Identify A to E.

A - Outer membrane, B - Inner membrane, C - Matrix,D - Inter- membrane space, E - Crista
A - Outer membrane, B -Inner membrane, C - Inter-membrane space, D - Matrix, E - Crista
A - Outer membrane, B - Inner membrane, C - Matrix,D - Crista, E - Inter - membrane space
A - Outer membrane, B - Inner membrane, C- Crista,D - Matrix, E - Inter-membrane space

Which of the following option correctly match A, B, C, and D indicated in the diagram?

A- Thylakoid, B-Stromal lamella, C- Stroma,D - Granum
A- Granum, B -Thylakoid, C - Stromal lamella,D - Stroma
A- Thylakoid, B -Granum, C - Stromal lamella,D - Stroma
A - Granum, B- Thylakoid, C - Stroma, D - Stromallamella

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