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Srijan ICSE Biology Class 7 Solutions. We covered all the Srijan ICSE Biology Class 7 Solutions chapter 1 to 7 pdf file provided in this post for free so that you can practice well for the exam.
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Srijan ICSE Biology Class 7 Objective with Solutions for Students
To study meiosis in plants, the best part would be:
(a) Shoot apex
(b) Root apex
(c) Anthers
(d) Leaf cells
Option c – Anthers
A plant hormone used for inducing morphogenesis in plant tissue culture is:
(a) Ethylene
(b) Gibberellin
(c) Cytokinin
(d) Abscisic acid
Option c – Cytokinin
Cell elongation in internodal regions of green plants takes place due to:
(a) Indole acetic acid
(b) Cytokinins
(c) Gibberellins
(d) Ethylene
Option c – Gibberellins
Plasticity in plant growth means that:
(a) Plant roots are extensible.
(b) Plant development is dependent on the environment.
(c) Stems can extend.
(d) None of the above
Option b – Plant development is dependent on the environment
The effect of photoperiod on the growth and development of plants, especially on flowering, is called:
(a) Vernalisation
(b) Photoperiodism
(c) Phototaxis
(d) Both (a) and (b)
Option b – Photoperiodism
The photoperiod in plants is perceived as:
(a) Meristem
(b) Flower
(c) Floral buds
(d) Leaves
Option d – Leaves
Which of the following is an example of a long-day plant?
(a) Tomato
(b) Maize
(c) Rice
(d) Radish
Option d – Radish
The flowering of plants by exposure to low temperatures is called:
(a) Vernalisation
(b) Cryobiology
(c) Photoperiodism
(d) Micrografting
Option a – Vernalisation
The temperature required for vernalization is:
(a) 5-10°C
(b) 5-15°C
(c) 0-5°C
(d) 3-17°C
Option c – 0-5°C
Examples of plants that require vernalization are:
(a) Pea
(b) Sugar beet
(c) Cabbage
(d) All of these
Option d – All of these
Vernalisation can be reversed by:
(a) Application of high temperature.
(b) Application of auxin.
(c) Application of more or less temperature.
(d) Application of gibberellin.
Option a – Application of high temperature
Which one among the following produces seeds but not flowers?
(a) Cashewnut
(b) Coffee
(c) Groundnut
(d) Pine
Option d – Pine
In females, a small portion of the oviduct is removed, and the cut end is ligated by surgical operation. This procedure is called:
(a) Vasectomy
(b) Tubectomy
(c) Neurotomy
(d) None of the above
Option b – Tubectomy
In the artificial insemination process, which of the following is/are introduced into the uterus of the female?
(a) Egg only
(b) Fertilized egg
(c) Sperm only
(d) Egg and sperm
Option c – Sperm only
In the human body, Cowper’s glands form a part of which one of the following?
(a) Digestive system
(b) Endocrine system
(c) Reproductive system
(d) Nervous system
Option c – Reproductive system
In the test tube baby:
(a) Fertilization of ova and development takes place in the test tube.
(b) Fertilization of ova takes place in the test tube while the development of the embryo occurs in the uterus.
(c) Fertilization takes place in the uterus while development takes place in the test tube.
(d) Development of ova takes place in the test tube without fertilization.
Option b – Fertilization of ova takes place in the test tube while the development of the embryo occurs in the uterus
Sertoli cells are present in:
(a) Male reproductive system.
(b) Female reproductive system.
(c) Both (a) and (b)
(d) None of the above
Option a – Male reproductive system
Which of the following roles is/are played by epididymis, vas deferens, seminal vesicles, and prostate in the male reproductive system of humans?
(a) Spermatogenesis and maturation of sperms
(b) Maturation and motility of sperms
(c) Spermatogenesis and motility of sperms
(d) Motility of sperms only
Option b – Maturation and motility of sperms
Corpus luteum is a mass of cells found in:
(a) Brain
(b) Ovary
(c) Pancreas
(d) Spleen
Option b – Ovary
Which one of the following is not an essential micronutrient for plants?
(a) Boron
(b) Potassium
(c) Sodium
(d) Magnesium
Option c – Sodium
Which of the following elements is not a micronutrient for plants?
(a) Iron
(b) Manganese
(c) Copper
(d) Magnesium
Option d – Magnesium
Which of the following plants is carnivorous?
(a) Cypress vine
(b) Venus Flytrap
(c) Amaryllis
(d) Hyacinth
Option b – Venus Flytrap
Identify the parasite in the following.
(a) Pitcher plant
(b) Cuscuta
(c) Bladderwort
(d) Sunflower
Option b – Cuscuta
In biological terms, …….. is a relationship between two organisms in which one organism benefits and the other is unaffected.
(a) Amensalism
(b) Mutualism
(c) Commensalism
(d) Parasitism
Option c – Commensalism
Which one of the following is an insectivorous plant?
(a) Utricularia
(b) Sequoia Gigantia
(c) Nostoc
(d) Bryophyta
Option a – Utricularia
‘Crop logging’ is a method of:
(a) Soil fertility evaluation.
(b) Plant analysis for assessing the requirements of nutrients for crop production.
(c) Assessing crop damage.
(d) Testing the suitability of fertilizers.
Option b – Plant analysis for assessing the requirements of nutrients for crop production
Which of the following elements is not essential for plant growth?
(a) Sodium
(b) Potassium
(c) Calcium
(d) Magnesium
Option a – Sodium
Which micronutrient is supplied by the soil to the plant?
(a) Phosphorus
(b) Calcium
(c) Zinc
(d) Nitrogen
Option c – Zinc
The net movement of water from a dilute to a concentrated solution through a selectively permeable membrane is called:
(a) Diffusion
(b) Dispersion
(c) Osmosis
(d) Absorption
Option c – Osmosis
An element present in Chlorophyll is:
(a) Ca
(b) Fe
(c) Mg
(d) S
Option c – Mg
The macro-nutrients provided by inorganic fertilizers are:
(a) Carbon, iron, and boron.
(b) Magnesium, manganese, and sulfur.
(c) Magnesium, zinc, and iron.
(d) Nitrogen, phosphorus, and potassium.
Option d – Nitrogen, phosphorus, and potassium
In root nodules of legumes, leghemoglobin is important because:
(a) It transports oxygen to the root nodule.
(b) It acts as an oxygen scavenger.
(c) It provides energy to the nitrogen-fixing bacterium.
(d) It acts as a catalyst in transamination.
Option b – It acts as an oxygen scavenger
Which one among the following is a micronutrient present in soil for various crops?
(a) Calcium
(b) Manganese
(c) Magnesium
(d) Potassium
Option b – Manganese
If cells are kept in some solution and the net result is that the cell swells up, then the solution is:
(a) Hypertonic
(b) Isotonic
(c) Hypotonic
(d) Acidic
Option c – Hypotonic
The maximum amount of water, that plants need to grow, is absorbed by the following:
(a) Embryonic zone
(b) Growing point
(c) Zone of elongation
(d) Root hairs
Option d – Root hairs
Osmosis is defined as:
(a) Diffusion of solvent (water) through a semipermeable membrane from a less concentrated solution to a more concentrated solution.
(b) Flow of solute from a semipermeable membrane.
(c) Flow of water without a membrane.
(d) Diffusion of suspended particles from higher to lower concentration.
Option a – Diffusion of solvent (water) through a semipermeable membrane from a less concentrated solution to a more concentrated solution
Which one of the following statements about the transport mechanism in plants is correct?
(a) Diffusion of ions and small molecules across the cell membrane requires energy.
(b) Active transport of ions and small molecules across the cell membrane against concentration gradient requires energy.
(c) Cells conserve energy, and no energy is required for the transport of ions and small molecules against the concentration gradient.
(d) Cells do not transport ions across their membrane as these are charged molecules.
Option b – Active transport of ions and small molecules across the cell membrane against concentration gradient requires energy
Which one of the following will happen if the medium surrounding the cell has a higher concentration than the cell?
(a) The cell will gain water.
(b) The cell will die.
(c) There will be no change.
(d) The cell will lose water.
Option d – The cell will lose water
The movement of water molecules through the plasma membrane is called:
(a) Osmosis
(b) Sedimentation
(c) Precipitation
(d) Transpiration
Option a – Osmosis
The first step of photosynthesis is:
(a) Activation of chlorophyll by sunlight.
(b) Oxygen comes out from water.
(c) Formation of carbohydrates.
(d) Fixation of carbon dioxide.
Option a – Activation of chlorophyll by sunlight
Which one of the following is active transport?
(a) It is the movement of a substance against a diffusion gradient with the use of energy from respiration.
(b) It is the movement of a substance against a diffusion gradient without the use of energy.
(c) It is the movement of a substance against a diffusion gradient with the use of energy from photosynthesis.
(d) It is the movement of a substance along a diffusion gradient with the use of energy from respiration.
Option a – It is the movement of a substance against a diffusion gradient with the use of energy from respiration
Gaseous exchange takes place in leaves through tiny pores for the purpose of photosynthesis. What are these pores?
(a) Chloroplast
(b) Stomata
(c) Chlorophyll
(d) Vacuole
Option b – Stomata
What is the shape of the two guard cells which enclose stomata?
(a) Oval
(b) Triangular
(c) Rectangular
(d) Kidney-shaped
Option d – Kidney-shaped
In which one of the following physiological processes, does excess water escape in the form of droplets from a plant?
(a) Transpiration
(b) Guttation
(c) Secretion
(d) Excretion
Option b – Guttation
The ultimate cause of water movement in a plant stem against gravity is:
(a) Osmosis
(b) Transpiration
(c) Photosynthesis
(d) Diffusion
Option b – Transpiration
The process by which plants prepare their food is:
(a) Carbohydrolysis
(b) Metabolic synthesis
(c) Photosynthesis
(d) Photorespiration
Option c – Photosynthesis
The role of chlorophyll in photosynthesis is:
(a) Absorption of water
(b) Absorption of light energy
(c) Absorption of CO₂
(d) None of the above
Option b – Absorption of light energy
The first compound that is fixed during photosynthesis is:
(a) Phosphoglyceric acid
(b) Starch
(c) Glucose
(d) Diphosphoglyceric acid
Option a – Phosphoglyceric acid
Flower colors of red, pink, blue, and purple come mainly from the pigments called:
(a) Carotenoids
(b) Lycopene
(c) Chlorophyll
(d) Anthocyanins
Option d – Anthocyanins
Solar energy is converted into ATP in:
(a) Mitochondria
(b) Chloroplast
(c) Ribosome
(d) Peroxisome
Option b – Chloroplast
Which one of the following gases comes out during photosynthesis?
(a) Oxygen
(b) Carbon dioxide
(c) Hydrogen
(d) Chlorine
Option a – Oxygen
The evolved oxygen during photosynthesis comes from the splitting of:
(a) Water
(b) Carbon dioxide
(c) Oxygen
(d) Light
Option a – Water
Which of the following organelles of a cell is/are involved in photosynthesis?
(a) Chloroplast
(b) Mitochondrion
(c) Endoplasmic reticulum
(d) Golgi bodies
Option a – Chloroplast
The by-product of photosynthesis is:
(a) CO2
(b) O₂
(c) Energy
(d) Sugar
Option b – O₂
Which one of the following gases is essential for photosynthesis?
(a) CO
(b) CO₂
(c) N₂
(d) O₂
Option b – CO₂
Most of the photosynthesis process occurs in: ( Srijan ICSE biology class 7 solutions )
(a) Blue and red region of light.
(b) Green and yellow region of light.
(c) Blue and orange region of light.
(d) Violet and orange region of light.
Option a – Blue and red region of light
When the chloroplast pigments absorb light:
(a) They become reduced.
(b) They lose potential excitement.
(c) Their electrons become excited.
(d) The Calvin cycle is triggered.
Option c – Their electrons become excited
Photosystem (PS-I) and Photosystem-II (PS-II) are named:
(a) In the sequence they work in light reaction.
(b) According to their molecular weight.
(c) In the sequence of their discovery.
(d) In the sequence of their constituents.
Option c – In the sequence of their discovery
During the light reaction of photosynthesis: ( Srijan ICSE biology class 7 solutions )
(a) ADP is phosphorylated and NADPH oxidized.
(b) ADP is phosphorylated and NADP reduced.
(c) ADP is phosphorylated and NADPH reduced.
(d) ATP is phosphorylated and NADPH reduced.
Option b – ADP is phosphorylated and NADP reduced
The sunlight energy used by green plants in photosynthesis is transformed into:
(a) Chemical energy
(b) Physical energy
(c) Both (a) and (b)
(d) None of the above
Option a – Chemical energy
Which of these is the energy conversion that happens in the process called photosynthesis?
(a) Potential energy to chemical energy.
(b) Light energy to chemical energy.
(c) Heat energy to light energy.
(d) Heat energy to light energy.
Option b – Light energy to chemical energy
Water-soluble pigments found in plant cell vacuoles are:
(a) Chlorophylls
(b) Carotenoids
(c) Anthocyanins
(d) Xanthophylls
Option c – Anthocyanins
Why are dark reactions called so?
(a) They occur in darkness.
(b) They are not light-dependent.
(c) They are not directly light-driven.
(d) Both (a) and (b)
Option c – They are not directly light-driven
Which of the following is an accessory pigment?
(a) Chlorophyll-a
(b) Chlorophyll-c
(c) Grana
(d) Hemozoin
Option b – Chlorophyll-c
The main photosynthetic pigments in plants are:
(a) Chlorophyll-a and chlorophyll-c
(b) Chlorophyll-a and chlorophyll-d
(c) Chlorophyll-b and chlorophyll-a
(d) Chlorophyll-b and chlorophyll-c
Option c – Chlorophyll-b and chlorophyll-a
CAM helps the plants in: ( Srijan ICSE biology class 7 solutions )
(a) Secondary growth
(b) Disease resistance
(c) Reproduction
(d) Conserving water
Option d – Conserving water
Which one of the following statements is correct?
(a) In photosynthesis by green plants, carbon dioxide is used for making carbohydrates.
(b) During photosynthesis, plants use oxygen to make carbohydrates.
(c) The carbohydrate generated by plants comes from the soil.
(d) The carbohydrate generated by plants comes from urea.
Option a – In photosynthesis by green plants, carbon dioxide is used for making carbohydrates
During respiration, energy is produced in the form of:
(a) ADP
(b) ATP
(c) NADP
(d) CO₂
Option b – ATP
The biosynthetic phase is called a dark reaction because:
(a) It depends on the light reaction.
(b) It does not depend on the light.
(c) It does not depend on NADPH.
(d) It does not depend on ATP.
Option b – It does not depend on the light
The steps of dark reactions are: ( Srijan ICSE biology class 7 solutions )
(a) Regeneration carboxylation → reduction
(b) Reduction → oxidation → hydrogenation
(c) Carboxylation → reduction → regeneration
(d) Reduction → carboxylation → regeneration
Option c – Carboxylation → reduction → regeneration
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