Download CORRECTIONS OF ERRORS (+1) EXEMPLAR

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CORRECTIONS OF ERRORS (+1) EXEMPLAR BIOLOGY
List of Multiple-choice questions for which wrong answers were given in the first edition of NCERT
exemplar and had not been corrected even in the errata. Now these are corrected as followsd) Redifferentiation
Animal Kingdom
4. Which of the following pairs of animals has
non glandular skin?
a) Snake and Frog
b) Chameleon and Turtle
c) Frog and Pigeon
d) Crocodile and Tiger
Earlier Wrong Ans. given - (c)
Now Corrected to - (b)
7. Which one of the following statements is
incorrect?
a) Mesoglea is present in between ectoderm
and endoderm in Obelia.
b) Asterias exhibit radial symmetry
c) Fasciola is a pseudocoelomate animal
d) Taenia is a triploblastic animal
Earlier Wrong Ans.Given-(a)
Now Corrected to - (c)
Earlier Wrong Ans. given - (a)
Now Corrected to - (c)
17. Which one of the following cell types always
divides by anticlinal cell division?
a) Fusiform initial cells
b) Root cap
c) Protoderm
d) Phellogen
Earlier Wrong Ans. given - (d)
Now Corrected to - (c)
Ans. (d)
Hint: Phellogen (Cork Cambium) cuts off cells on
outer and inner side (i.e, cells divide in a
tangential plane), this is periclinal division.
Protoderm may divide periclinally to form
multiseriate epidermis. Epidermis is usually
uniseriate which is formed by anticlinal
division of Protoderm. Thus, (c) Protoderm is
the best option.
Morphology of Flowering Plants
8. The placenta is attached to the developing
seed near the
a) Testa
b) Hilum
c) Micropyle
d) Chalaza
Earlier Wrong Ans.Given-(d)
Now Corrected to - (b)
Anatomy of Flowering Plants
4. Identify the tissue system from among the
following
a) Parenchyma
b) Xylem
c) Epidermis
d) Phloem
Earlier Wrong Ans.given- (a)
Hint: There are three types of tissue systems in
plants. Epidermal Tissue System, Ground
Tissue System & Vascular Tissue System. So
none of the given choices was correct. Even
epidermis alone is not a tissue system & is a
part of Epidermal Tissue System. Thus none
of the options is a perfectly correct answer.
Now Question statement changed toIdentify the simple tissue among the following
-Now (a) becomes the Correct Ans.
8. Interfascicular cambium and cork cambium
are formed due to
a) Cell division
b) Cell differentiation
c) Cell dedifferentiation
Transport in Plants
7. When a plant undergoes senescence, the
nutrients may be
a) exported
b) withdrawn
c) translocated
d) None of the above
Earlier Wrong Ans. given - (b)
Now Corrected to - (c) and following changes
made to the options in the question
a) accumulated
b) bound to cell
Mineral Nutrition
2.
Which one of the following statements can
best explain the term critical concentration of
an essential element?
a) Essential element concentration below
which plant growth is retarded.
b) Essential element concentration below
which plant growth becomes stunted.
c) Essential element concentration below
which plant remains in the vegetative phase.
d) None of the above
Earlier Wrong Ans. given - (b)
Now Corrected to - (c) and option b)
changed
to
-Essential
element
concentration below which plant growth
becomes enhanced.
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Respiration in Plants
4. Electron Transport System (ETS) is located in
mitochondrial
a) Outer membrane
b) Inner membrane space
c) Inner membrane
d) Matrix
Earlier Wrong Ans.Given-(b)
Now Corrected to - (c)
6. Choose the correct statement:
a) Pyruvate is formed in the mitochondrial
matrix.
b) During the conversion of succinyl Co-A to
succinic acid a molecule of ATP is
synthesized.
c) Oxygen is vital in respiration for removal
of hydrogen
d) There is complete breakdown of glucose
in fermentation
Our Suggestion - Exemplar has given the
option (c) as answer, but (b) is also a correct
option.
Question deleted
Breathing & Exchange of Gases
8. Mark the correct pair of muscles involved in
the normal breathing in humans
a) External and internal intercostal muscles
b) Diaphragm and abdominal muscles
c) Diaphragm and external intercostal muscles
d) Diaphragm and internal intercostal muscles
Earlier Wrong Ans.Given-(d)
Now Corrected to - (c) also option
d) changed to diaphragm and
intercostal muscles.
Structural Organisation in Animals
4. Setae help in locomotion in earthworm but are
not uniformly present in all the segments.
They are present in
a) Segments 13 – 14 – 15
b) Segments 14 – 15 – 16
c) Segments 12 – 13 – 14
d) Segments 15 – 16 – 17
Wrong Ans.Given (b)
Hint: All the options are incorrect. Setae are
present in all body segments except the
first, last and clitellum (14, 15, 16 segments).
Question cancelled
Cell: The Unit of Life
11. Which of the following statements is not true
for plasma membrane?
a) It is present in both plant and animal cell
b) Lipid is present as a bilayer in it
c) Proteins are present integrated as well as
loosely associated with the lipid bilayer
d) Carbohydrates are never found in it.
Earlier Wrong Ans.Given-(a)
Now Corrected to - (d)
12. Plastid differs from mitochondria on the basis
of one of the following features. Mark the
right answer:
a) Presence of two layers of membrane
b) Presence of ribosome
c) Presence of thylakoid
d) Presence of DNA
Earlier Wrong Ans.Given-(a)
Now Corrected to - (c)