Which of the following light will excite the reaction centre in cyclic photophosphorylation?
Anonymous Quiz
4%
Light below wavelength 340nm
5%
Light at wavelength 500nm
81%
Light beyond wavelength 680nm
10%
Light below wavelength 680nm
In the photochemical phase of photosynthesis, which one of the following is common to both
cyclic as well as non-cyclic photophosphorylation?
cyclic as well as non-cyclic photophosphorylation?
Anonymous Quiz
15%
Involvement of both P700 and P680
66%
ATP formation
15%
Formation of NADPH
4%
Release of O2
If there is no rotation of plane polarized light by a compound in a specific solvent, thought to be
chiral, it may mean that
chiral, it may mean that
Anonymous Quiz
11%
The compound is certainly a chiral
21%
The compound is certainly meso
9%
There is no compound in the solvent
60%
The compound may be a racemic mixture
Chirality of carbon compound is because of its
Anonymous Quiz
86%
Tetrahedral nature of carbon
7%
Monovalent nature of carbon
4%
Divalent nature of carbon
3%
Trivalent nature of carbon
Which one of the following exhibits geometrical isomerism
Anonymous Quiz
2%
1,1-dibromopropene
26%
2, 3-dimethylbut-2-ene
52%
2, 3-dibromobut-2-ene
12%
2-methylbut-2-ene
8%
2, 3-dibromobut-1-ene
Diethyl ether is not associated with which one of these isomers
Anonymous Quiz
12%
Butanoic acid
13%
Methyl propionate
24%
ethanol
50%
All of these
Which kind of isomerism is possible for 1- chloro-2- nitroethene
Anonymous Quiz
17%
Functional group isomerism
20%
Optical isomerism
47%
E/Z isomerism
15%
Position isomerism
In the photochemical phase of photosynthesis, which one of the following is common to both
cyclic as well as non-cyclic photophosphorylation?
cyclic as well as non-cyclic photophosphorylation?
Anonymous Quiz
9%
Involvement of both P700 and P680
77%
ATP formation
8%
Formation of NADPH
7%
Release of O2
In a chloroplast, the highest number of protons are found in
Anonymous Quiz
16%
intermembrane space
4%
antennae complex
16%
stroma
65%
lumen of thylakoids
During which phase the duplication of the centriole occurs in the cytoplasm?
Anonymous Quiz
85%
‘S’ phase
6%
Telophase
6%
Metaphase
3%
Prophase
Human heart is______ in origin.
Anonymous Quiz
4%
ectodermal
89%
mesodermal
5%
endodermal
2%
none of the above
Ethyl acetoacetate shows, which type of isomerism
Anonymous Quiz
5%
Propane
63%
2, 2-Dimethylpropane
21%
2-Methylpropane
11%
n-Butane
Which of the following statements is not correct for a nucleophile?
Anonymous Quiz
9%
Ammonia is a nucleophile.
19%
Nucleophiles attack low e- density sites
17%
Nucleophiles are not electron seeking.
56%
Nucleophile is a Lewis acid.
When 2-bromopentane is heated with alcoholic solution of potassium hydroxide, the major
product obtained is
product obtained is
Anonymous Quiz
9%
pent -1-ene
80%
pent-2-ene
8%
pent-1-yne
3%
pent-2-yne
The decreasing order of boiling points is
Anonymous Quiz
69%
n-pentane > iso-pentane > neo-pentane
8%
Iso-pentane > n-pentane > neo-pentane
15%
Neo-pentane > iso-pentane > n-pentane
8%
n-pentane > neo-pentane > iso-pentane
Of the five isomeric hexanes, the isomer which can give two monochlorinated compounds is
Anonymous Quiz
12%
n-hexane
55%
2, 3-dimethylbutane
27%
2,2-dimethylbutane
6%
2-methylpentane
A patch of nodal tissue present in the right upper corner of the right atrium is called
Anonymous Quiz
1%
ventricular node
84%
sino-atrial node
13%
atrio-ventricular node
2%
atrio-ventricular septum