NEET PREVIOUS YESR QUESTIONS - 1
1. Which
of the following is the first stable product of CO2 fixation in C4 plants?
A)
Oxaloacetic acid (OAA)
B)
Phosphoglyceric acid (PGA)
C) Malic
acid
D)
Phosphoenolpyruvate (PEP)
2. Which
of the following is the primary site of ultrafiltration in the human nephron?
A)
Proximal Convoluted Tubule (PCT)
B) Loop
of Henle
C)
Bowman's capsule and Glomerulus
D)
Collecting Duct
Explanation: Ultrafiltration happens under high pressure across
the filtration membrane formed by the glomerular capillaries and the inner
podocyte layer of the Bowman's capsule (together known as the Malpighian
corpuscle).
3. If a
double-stranded DNA has 20% Adenine, what will be the percentage of Guanine in
it?
A) 20%
B)
30%
C) 40%
D) 80%
4. Which
cell organelle is responsible for the synthesis of steroidal hormones in animal
cells?
A)
Smooth Endoplasmic Reticulum (SER)
B) Rough
Endoplasmic Reticulum (RER)
C) Golgi
apparatus
D)
Lysosomes
5. What
is the hybridization and geometry of the central metal ion in the complex [Ni(CN)4]^2?
A) sp^3,
Tetrahedral
B)
dsp^2, Square planar
C) sp^3d,
Trigonal bipyramidal
D) $d^2sp^3$, Octahedral
6. Which
of the following is most reactive towards nucleophilic substitution reaction?
A)
Chlorobenzene
B) p-Nitrochlorobenzene
C)
2,4,6-Trinitrochlorobenzene
D)
$2,4$-Dinitrochlorobenzene
7. Which
of the following molecules/ions does not exist under normal conditions?
A) He2+
B) Li2
C)
Be2
D) B2
8. The
photoelectric effect supports the quantum nature of light because:
A) There
is a threshold frequency below which no electrons are emitted.
B) There
is no time lag between the arrival of light and the emission of photoelectrons.
C)
Maximum kinetic energy depends linearly on frequency and is independent of
intensity.
D)
All of the above.
Explanation: Classical wave theory could not explain the
threshold frequency, the instantaneous nature of emission, or the fact that
intensity alters current but not kinetic energy. All three conditions strictly
point to light acting as discrete packets of energy (photons).
9. A
convex lens of focal length 20 cm is placed in contact with a concave lens of
focal length 40 cm. What is the power of the combination?
A)
+2.5 D
B) -2.5 D
C) +5.0 D
D) -5.0 D
10. If
the length of a uniform conducting wire is stretched to double its original
length, its resistance becomes:
A) Two
times
B)
Four times
C) Half
D)
One-fourth
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