1
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
Four healthy people in their twenties got involved in injuries resulting in damage and death of a few cell of the following. Which of the cells are least likely to be replaced by new cells -
A
Malpighian layer of the skin
B
Osteocytes
C
Neurons
D
Liver cells
2
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
Chlorophyll in chloroplasts is located in
A
Stroma
B
Grana
C
Pyrenoid
D
Both (A) and (C)
3
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
According to widely accepted "fluid mosaic model" cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements are incorrect ?
A
Proteins in cell membranes can travel within the lipid bilayer
B
Proteins can also undergo flip-flop movements in the lipid bilayer
C
Proteins can remain confined within certain domains of the membranes
D
Many proteins remain completely embedded within the lipid bilayer
4
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on
A
Proton gradient
B
Membrane potential
C
Accumulation of Na+ ions
D
Accumulation of K+ ions