Anabaena and Nostoc are capable of fixing nitrogen in free-living state also
B
Root module forming nitrogen fixers live as aerobes under free-living conditions.
C
Phosphorus is a constituent of cell membrances, certain nucleic acids and all proteins.
D
Nitrosomonas and Nitrobacter are chemo-autotrophs.
2
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
The curve given below shows enzymatic activity in relation to three conditions (pH, temperature and substrate concentration). What do the two axes (x and y) represent?
A
x-axis
y-axis
enzymatic activity
pH
B
x-axis
y-axis
temperature
enzyme activity
C
x-axis
y-axis
substrate concentration
enzymatic activity
D
x-axis
y-axis
enzymatic activity
temperature
3
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
Which one of the following structural formulae of two organic compounds is correctly identified along with its related function?
A
B : Adenine - A nucleotide that makes up nucleic acids
B
A : Triglyceride - Major source of energy
C
B : Uracil - A component of DNA
D
A : Lecithin - A component of cell membrane
4
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
Three of the following statements about enzymes are correct and one is wrong. Which one is wrong?
A
Enzymes require optimum pH for maximal activity.
B
Enzymes are denaturated at high temperature but in certain exceptional organisms they are effective even at temperatures 80o - 90oC.
