Biology-I-Section-A
1. The transverse section of plant part showed polyarch, radial and exarch xylem, with endodermis and pericycle. The plant part is identified as:
1. |
Monocot root |
2. |
Dicot root |
3. |
Dicot stem |
4. |
Monocot stem |
2. Which of the following is/are a correct match?
I: |
Bulliform cells |
large, bubble-shaped epidermal cells that occur in groups on the upper surface of the leaves of many monocots. |
II: |
Lenticells |
a porous tissue consisting of cells with large intercellular spaces in the periderm of the secondarily thickened organs and the bark of woody stems and roots of dicotyledonous flowering plants |
1. Only
I
2. Only
II
3. Both
I and
II
4. Neither
I nor
II
3. In an isobilateral leaf:
I: |
the stomata are present on both the surfaces of the epidermis |
II: |
the mesophyll is not differentiated into palisade and spongy parenchyma |
1. Only
I is correct
2. Only
II is correct
3. Both
I and
II are correct
4. Both
I and
II are incorrect
4. Identify the correct statements:
I: Guard cells are dumbbell shaped in dicots
II: Initiation of lateral roots and vascular cambium during the secondary growth takes place
in pericycle cells in dicot roots.
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
5. The number of correct statements regarding anatomy of dicot stems is:
Statement I: |
Hypodermis consists of a few layers of collenchymatous cells. |
Statement II: |
The cells of the endodermis are rich in protein granules. |
Statement III: |
Pericycle is in the form of semi-lunar patches of sclerenchyma. |
Statement IV: |
The ‘ring’ arrangement of vascular bundles is a characteristic of dicot stem. |
1. 1
2. 2
3. 3
4. 4
6. Bulliform cells found in adaxial epidermis in grasses:
1. enable the leaf to fold.
2. are found in the endodermis.
3. are highly photosynthetic.
4. are characteristic of xeromorphic plants.
7. In conjoint type of vascular bundles:
I: |
xylem and phloem are jointly situated on the same radius of vascular bundles. |
II: |
xylem is usually located on the outer side of the phloem. |
1. Only I is correct |
2. Only II is correct |
3. Both are correct |
4. Both are incorrect |
8. Specialised epidermal cells surrounding the guard cells are called?
1. subsidiary cells
2. bulliform cells
3. lenticels
4. complementary cells
9. In a monocot stem:
I: |
hypodermis is collenchymatous |
II: |
vascular bundles are conjoint and closed |
III: |
phloem parenchyma is absent |
1. Only
I and
II are correct
2. Only
I and
III are correct
3. Only
II and
III are correct
4.
I,
II and
III are correct
10. Presence of exarch and polyarch vascular bundles is characteristically seen in:
1. |
Monocot stem |
2. |
Monocot root |
3. |
Dicot stem |
4. |
Dicot root |
11. In the transverse section of monocot stem, the highlighted portion [marked as X] is:
1. Sclerenchymatous hypodermis
2. Collenchymatous hypodermis
3. Suberised casparian strip
4. Starch sheath
12. The non-technical term Bark in an old woody stem does not include:
1. Cork
2. Secondary phloem
3. Secondary cortex
4. Vascular cambium
13. Regarding endodermis of dicot roots:
I: |
It comprises a single layer of pear-shaped cells with well-developed intercellular spaces. |
II: |
The tangential as well as radial walls of the endodermal cells have a deposition of water-impermeable, waxy material suberin in the form of casparian strips. |
1.
I is correct;
II is correct
2.
I is incorrect;
II is correct
3.
I is incorrect;
II is incorrect
4.
I is correct;
II is incorrect
14. Consider the given two statements:
I: |
Dicot roots do not undergo secondary growth. |
II: |
In the dicot root, the vascular cambium is completely secondary in origin. |
1. |
Both I and II are correct and II explains I |
2. |
Both I and II are correct but II does not explain I |
3. |
I is correct but II is incorrect |
4. |
I is incorrect but II is correct |
15. The highlighted portion [in blue colour; marked as X] in the given T.S. of a monocot root is the outermost layer of the stele. This is the:
1. Hypodermis
2. Cortex
3. Pericycle
4. Endodermis
16. Initiation of lateral roots and vascular cambium during the secondary growth in dicot roots takes place in:
1. Epidermis
2. Cortex
3. Endodermis
4. Pericycle
17. For the formation of interfascicular cambium and cork cambium the parenchyma cells first undergo:
1. Differentiation
2. Dedifferentiation
3. Redifferentiation
4. Reverse differentiation
18. Consider the given two statements:
Assertion(A) |
Monocotyledonous roots do not undergo any secondary growth. |
Reason (R): |
There are usually more than six (polyarch) xylem bundles in the monocot root. |
1. |
Both (A) and (R) are True but (R) does not correctly explain the (A). |
2. |
(A) is True but (R) is False. |
3. |
Both (A) and (R) are True and (R) correctly explains the (A). |
4. |
(A) is False but (R) is True. |
19. Casparian strips occur in?
1. Epidermis
2. Pericycle
3. Cortex
4. Endodermis
20. In dicot stems, each vascular bundle is:
1. conjoint, open, and with endarch protoxylem.
2. conjoint, closed, and with endarch protoxylem.
3. radial, open, and with endarch protoxylem.
4. conjoint, open, and with exarch protoxylem.
21. A diagram of the transverse section of a monocot leaf is given below with certain parts indicated as letters of the alphabet. Select the option which incorrectly matches the alphabet with the part it represents:
1. |
A - Adaxial epidermis |
2. |
B - Phloem |
3. |
C - Mesophyll |
4. |
D - Abaxial epidermis |
22. The type of vascular bundle shown in the given figure is seen in:
I: Roots
II: Monocot stems
III: Dicot stems
1. Only I
2. Only II and III
3. Only I and II
4. Only II
23. How many of the given statements regarding stomata in plants are correct?
I: |
Stomata are structures present in the epidermis of leaves. |
II: |
Stomata regulate the process of transpiration and gaseous exchange. |
III: |
Each stoma is composed of two bean-shaped cells known as subsidiary cells which enclose stomatal pore. |
IV: |
In grasses, the guard cells are dumb-bell shaped. |
V: |
The inner walls of guard cells (towards the stomatal pore) are thin and the outer walls (away from the stomatal pore) are highly thickened. |
1. 2
2. 3
3. 4
4. 5
24. The transverse section of a plant shows following anatomical features:
a. |
Large number of scattered vascular bundles surrounded by bundle sheath. |
b. |
Large conspicuous parenchymatous ground tissue. |
c. |
Vascular bundles conjoint and closed. |
d. |
Phloem parenchyma absent. |
Identify the category of plant and its part :
1. Monocotyledonous root
2. Dicotyledonous stem
3. Dicotyledonous root
4. Monocotyledonous stem
25. Unlike dicot stems, the hypodermis of monocot stem is composed of:
1. |
Parenchyma |
2. |
Sclerenchyma |
3. |
Collenchyma |
4. |
Chlorenchyma |
26. What will be true for the figure showing the transverse section of an angiosperm root?
I: It is a section of a dicot root.
II: Secondary growth will be well marked later in this root.
III: The vascular bundles shown are radial and polyarch.
|
I |
II |
III |
1. |
T |
T |
T |
2. |
F |
F |
F |
3. |
F |
F |
T |
4. |
T |
T |
F |
27. Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following :
1. Tyloses in vessels
2. Closure of stomata
3. Flaccidity of bulliform cells
4. Shrinkage of air spaces in spongy mesophyll
28. Initiation of lateral roots and vascular cambium during secondary growth takes place in cells of :
1. |
Epiblema |
2. |
Cortex |
3. |
Endodermis |
4. |
Pericycle |
29. The phloem parenchyma is absent, and water-containing cavities are present within the vascular bundles in:
1. |
Monocot roots |
2. |
Dicot roots |
3. |
Monocot stems |
4. |
Dicot stems |
30. Trichomes in stems can perform all the following functions except:
1. Generate secretory products to cause sting.
2. Reduce herbivory.
3. Bring about greater water loss through extended surface area of the epidermis.
4. Provide shade.
31. Stomatal apparatus in the epidermal tissue system of plants consists of:
1. |
Only stomatal aperture and guard cells but not subsidiary cells. |
2. |
Only stomatal aperture but not guard cells and subsidiary cells. |
3. |
Only guard cells and subsidiary cells but not stomatal aperture. |
4. |
Stomatal aperture, guard cells and subsidiary cells but not other epidermal cells. |
32. Transverse section of a plant part shows conjoint and open vascular bundles. The transverse section is of:
1. monocot root
2. monocot stem
3. dicot root
4. dicot stem
33. In isobilateral (monocotyledonous) leaf:
I: |
The stomata are present on both the surfaces of the epidermis. |
II: |
The mesophyll is not differentiated into palisade and spongy parenchyma. |
III: |
The parallel venation in monocot leaves is reflected in the near similar sizes of vascular bundles (except in main veins) as seen in vertical sections of the leaves. |
1. Only
I and
II are correct
2. Only
II and
III are correct
3.
I,
II and
III are correct
4. Only
III is correct
34. The parallel venation in monocot leaves is reflected in the:
1. |
near similar sizes of vascular bundles, including main veins, as seen in vertical sections of the leaves. |
2. |
near similar sizes of vascular bundles, except in main veins, as seen in vertical sections of the leaves. |
3. |
large sizes of vascular bundles in mid rib and smaller in veins, as seen in vertical sections of the leaves. |
4. |
smaller sizes of vascular bundles in mid rib and larger in veins, as seen in vertical sections of the leaves. |
35. In angiosperms:
1. |
the outside of the root epidermis is often covered with a waxy
thick layer called the cuticle. |
2. |
the guard cells possess chloroplasts. |
3. |
the root hairs are usually multi-cellular. |
4. |
the trichomes in the shoot system are usually unicellular. |
Biology-I-Section-B
36. In a dorsiventral [dicotyledonous] leaf:
I: |
The abaxial epidermis generally bears more stomata than the adaxial epidermis. |
II: |
The palisade parenchyma is adaxially placed. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
37. Ground tissue in plant body consists of:
I: |
all tissues except epidermis and vascular bundles. |
II: |
simple tissues such as parenchyma, collenchyma and sclerenchyma. |
III: |
parenchymatous cells in cortex, pericycle, pith and medullary rays, in the primary stems and roots. |
IV: |
thin-walled chloroplast containing cells called mesophyll in leaves. |
1. Only
I and
II are correct
2. Only
III and
IV are correct
3.
I,
II,
III and
IV are correct
4. Only
I,
III and
IV are correct
38. Initiation of lateral roots and vascular cambium during the secondary growth in dicot roots takes place in:
1. Epidermal cells
2. Cortex cells
3. Pericycle
4. Endodermis
39. Casparian strips are:
1. |
waxy deposition of suberin on only the tangential walls of the endodermal cells |
2. |
waxy deposition of suberin on only the radial walls of the endodermal cells |
3. |
waxy deposition of suberin on both tangential and radial walls of the endodermal cells |
4. |
waxy deposition of lignin on both tangential and radial walls of the endodermal cells |
40. The cambial ring in the dicot stem cuts:
1. |
cells that mature into secondary xylem towards pith and into secondary phloem towards periphery |
2. |
cells that mature into secondary xylem towards periphery and into secondary phloem towards pith |
3. |
cells that mature into primary xylem towards pith and into primary phloem towards periphery |
4. |
cells that mature into primary xylem towards periphery and into primary phloem towards pith |
41. Water containing cavities within the vascular bundles is a feature of the anatomy of a:
1. Monocot stem
2. Dicot stem
3. Monocot root
4. Dicot root
42. The given figure shows the transverse section of:
1. |
Isobilateral (Monocotyledonous) Leaf; where A is xylem and B is phloem |
2. |
Isobilateral (Monocotyledonous) Leaf; where A is phloem and B is xylem |
3. |
Dorsiventral (Dicotyledonous) Leaf; where A is xylem and B is phloem |
4. |
Dorsiventral (Dicotyledonous) Leaf; where A is phloem and B is xylem |
43. Vascular bundles in monocotyledons are considered closed because:
1. |
a bundle sheath surrounds each bundle |
2. |
cambium is absent |
3. |
there are no vessels with perforations |
4. |
xylem is surrounded all around by phloem |
44. Study the given diagram of phloem tissue in angiosperms and select the correct statements:
Statement I: |
‘A’ at maturity lose its protoplasm and becomes dead. |
Statement II: |
‘B’ stores food material and other substances like resins, latex, and mucilage. |
1. |
Statement I is incorrect; Statement II is correct |
2. |
Statement I is correct; Statement II is incorrect |
3. |
Statement I is correct; Statement II is correct |
4. |
Statement I is incorrect; Statement II is incorrect |
45. The term ‘stele’ [in the context of the anatomy of the dicot root] includes all the following structures except:
1. pericycle
2. vascular bundles
3. pith
4. endodermis
46. Identify the incorrect comparison between monocots and dicots in general:
|
Character |
Monocots |
Dicots |
1. |
Leaves |
Parallel venation |
Reticulate venation |
2. |
Roots |
Primary root of short duration, replaced by adventitial roots forming fibrous or fleshy root systems |
Develops from the radicle. Primary root often persists forming strong tap roots and secondary roots |
3. |
Plant stem: Vascular bundles |
Ring of primary bundles with cambium, differentiated into cortex and stele |
Numerous scattered bundles in ground parenchyma, cambium mostly absent, no differentiation between cortical and stelar regions |
4. |
Flowers |
Parts in threes (trimerous) or multiples of three |
Fours (tetramerous) or fives (pentamerous) |
47. What given anatomical feature is not correct for a dicot stem?
1. |
Hypodermis |
Sclerenchymatous |
2. |
Endodermis |
Starch sheath |
3. |
Medullary rays |
Parenchyma cells |
4. |
Protoxylem |
Endarch |
48. Consider the two statements:
Assertion (A): |
Secondary growth takes place in dicot stems but not in monocot stems. |
Reason (R): |
Hypodermis is collenchymatous in dicot stems while it is sclerenchymatous in monocot stems. |
1. |
(A) is True but (R) is False |
2. |
Both (A) and (R) are True but (R) does not explain (A) |
3. |
(A) is False but (R) is True |
4. |
Both (A) and (R) are True and (R) correctly explains (A) |
49. The transverse section of a dicot root is unlikely to show the presence of a conspicuous:
1. cortex.
2. pericycle.
3. pith.
4. endodermis.
50. Consider the following tissues in the stellar region of a stem showing secondary growth.
(A) Primary xylem
(B) Secondary xylem
(C) Primary phloem
(D) Secondary phloem
Arrange these in the correct sequence of their position from pith towards cortex.
1. |
(A), (B), (D), (C) |
2. |
(B), (A), (C), (D) |
3. |
(A), (B), (C), (D) |
4. |
(B), (A), (D), (C) |
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