1
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
Change Language
Which one of the following cellular parts is correctly described ?
A
Lysosomes - optimally active at a pH of about 8.5
B
Centrioles - sites for active RNA synthesis
C
Thylakoids - flattened membranous sacs forming the grana of chloroplasts
D
Ribosomes - those on chloroplasts are larger (80s) while those in the cytoplasm are smaller (70s)
2
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Change Language
Which one of the following does not differ in E.coli and Chlamydomonas ?
A
Chromosomal Organization
B
Cell wall
C
Ribosomes
D
Cell membrane
3
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Change Language
What is true about ribosomes ?
A
These are self - splicing introns of some RNAs.
B
These are found only in eukaryotic cells
C
There are composed of ribonucleic acid and proteins
D
The prokaryotic ribosomes are 80 S, where 'S' stands for sedimentation coefficient.
4
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Change Language
Select the the correct statement from the following regarding cell membrane
A
Na+ and K+ ions move across cell membrane by passive transport
B
Lipids are arranged in bilayer with polar heads towards the inner part
C
Proteins make up 60 to 70% of the cell membrane
D
Fluid mosaic model of cell membrane was proposed by singer and Nicolson
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