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1. Sclerenchymatous hypodermis is found in
A . Monocot stem
B . Dicot roots
C . Dicot stem
D . Monocot roots
Solution:
Monocot stem has sclerenchymatous hypodermis while dicot stem has collenchymatous hypodermis (mainly herbaceous) hypodermis not found in roots.
Correct Answer : A
2. The meristem responsible for primary growth in grasses and \(Equisetum\) stem is
A . Apical Meristem
B . Intercalary Meristem
C . Lateral Meristem
D . More than one option is correct
Solution:
The meristem which occurs between mature tissues are known as intercallary meristem. They occur in grasses. They are called as primary meristems because they occur early in a life of a plant and contribute to the formation of primary plant body.
Correct Answer : B
3. Identify the correct statement
A . Pericycle is the innermost layer of cortex
B . Endodermis is outermost layer of stele
C . Pith and cortex are distinct in monocot stem
D . Vascular bundles are scattered in ground tissues in maize stem
Solution:
In monocot stems, the vascular bundles are dispersed. In dicot stems, the vascular bundles are arranged in ring.
Correct Answer : D
4. Meristematic cells have :-
A . Thick cell wall and large intercellular spaces
B . Thick cell wall and no intercellular spaces
C . Thin cell wall and large intercellular spaces
D . Thin cell wall and no intercellular spaces
Solution:
The characteristics of meristematic cells are: -
1) The cells are isodiametric with thin cellulosic cell walls with no secondary cell wall.
2) They divide rapidly hence, there is no stored food in these cells.
3) They are compactly arranged cells with no intercellular spaces.
4) They have a dense cytoplasm with a prominent nucleus.
Correct Answer : D
5. Which of the following layer in dicot stem is rich in starch grains?
A . Pith
B . Endodermis
C . Hypodemis
D . Pericycle
Solution:
The cells of endodermis are rich in starch grains.
Correct Answer : B
6. Lateral translocation of substances is a function associated with
A . Pericycle
B . Pith rays
C . Xylem vessels
D . Sieve elements
Solution:
These medullary or pith rays are essential for the radial conduction of the water, minerals and other organic substances. They transport the substances from Centre to periphery.
Correct Answer : B
8. Palisade parenchyma is absent in leaves of:
A . Gram
B . Sorghum
C . Mustard
D . Soybean
Solution:
Monocot leaves have undifferentiated mesophyll cells, so they have no palisade parenchyma e.g. Maize, Sugarcane, Sorghum etc.
Correct Answer : B
9. In roots, the protoxylem lies towards periphery and metaxylem lies towards the centre. Such arrangement of primary xylem is called
A . Endarch
B . Exarch
C . Polyarch
D . Triarch
Solution:
Exarch is used when there is more than one strand of primary xylem in a stem or root, and the xylem develops from the outside inwards towards the center, i.e. centripetally.
Correct Answer : B
10. Ontogenetically related cells or sister cells are
A . Sieve tube and companion cells
B . Phloem and xylem
C . Tracheid and vessels
D . Phloem parenchyma and xylem parenchyma
Solution:
Origin of sieve tube and companion cells are from same mother cell.So, both are also known as sister cells ontogenetically related cells.
Correct Answer : A
11. Read the statements given below
A. Xylem provides mechanical strength to the plant parts
B. Vessels are not present in most gymnosperms
C. Xylem parenchyma stores food and tannins
D. Xylem fibres are never septate
Identify the right combination
A . (A,B & C) are correct
B . Only D is correct
C . (A,B & D) are correct
D . (C & D) are correct
Solution:
Xylem fibres are may be septate or aseptate. Vessels are absent in pteridophytes and most gymnosperms it is a characteristic feature of angiosperms.
Correct Answer : A
12. Which one of the following is not a feature of monocot leaf?
A . Motor cell
B . Bundle sheath
C . Spongy cell
D . Abaxial xylem
Solution:
Theory based question hence no detailing Xylem is found adaxially.
Correct Answer : D
13. Select incorrect statement w.r.t. meristems
A . Primary growth in Equisetum is the result of intercalary meristems activity
B . Metabolically active cells with high suface area per unit volume and nucleocytoplasmic ratio
C . Ergastic substances are absent
D . Thin walled cells without intercellular spaces
Solution:
Meristematic cells are thin walled, without intercellular spaces Nonliving inclusions are not found. These are actively dividing cells having low surface area to volume ratio and low karyoplasmic index
Correct Answer : B
14. Tissue is defined as a group of cells that are
A . Same in origin and function
B . Same in origin but always differ in function
C . Differ in origin and function
D . Differ in origin but same in function
Solution:
A tissue is a group of cells having a common origin and usually performing a common function or may also differ in function.
Correct Answer : A
15. Select the incorrect statement
A . Sieve tubes have P-proteins
B . Sieve tubes provide mechanical strength
C . Source of enzyme papain is latex of Carica papaya
D . Sieve cells are present in the pteridophytes
Solution:
Sieve tubes consist of sieve elements which are elongated cells, connected to each other via sieve plates to form a continuous tube system that spreads out through the entire plant.
Correct Answer : B
16. Cells of endodermis devoid of ligno-suberin strip are called
A . Motor cells
B . Bulliform cells
C . Passage cells
D . Lithocysts
Solution:
Passage cell of endodermis is situated just above the protoxylem and are devoid of lignin and suberin.
Correct Answer : C
17. Consider the following statements out of them how many are true -
(A) \(Pinus\) is evergreen because at the tip of dwarf shoots needle like folioge leaves are present which are persist for several years.
(B) According to Frick algal component of lichen can grow independently when separated from fungal component.
(C) Potato spindle tuber disease is caused by viroid.
(D) Inter fascicular cambium is an example of secondary meristem.
A . two
B . three
C . four
D . one
Solution:
Algal component of lichen can grow independently when separated from fungal component because the algae is autotrophic organism. Potato Spindle Tuber Viroid pathogen of potatoes which causes stunting of the plant and malformation and cracking of tubers.
Correct Answer : C
18. Primary meristems are derived from promeristem and are responsible for
A . Formation of secondary permanent tissue after dedifferentiation
B . Increase in gith only
C . Formation of primary structures of plants
D . Giving rise cork layer in dicot trees
Solution:
Primary meristem form primary permanent tissue by the process of differentiation. Remaining options are result of secondary meristen.
Correct Answer : C
19. Hypodermis is collenchymatous in
A . Yucca
B . Mango
C . Dracaena
D . (Agave
Solution:
The hypodermis is generally collenchymatous in dicots (mango) and sclerenchymatous in monocots (yucca, dracaena, agave).
Correct Answer : B
20. Which of the following is correct w.r.t. dicot leaf
A . Mesophyll cells are not differentiated
B . Mostly the stomata are on lower surface
C . Protoxylem is toward lower epidermis
D . Vascular bundles are open
Solution:
In dorsiventral/dicot leaf, stomata are found mostly on lower surface i.e., hypostomatic type
Correct Answer : B
Biology Faculty
BDS from PT. B.D. Sharma University of Health Sciences, Rohtak
