👉 Download Biology Question Paper PDF - SET 10
PART A: BOTANY
I. Answer any 3 questions from 1 – 5. Each carries 1 score. (3 x 1 = 3)
01) Which class of algae is commonly known as Red algae?
✅ Rhodophyceae
02) PS I: Red light of 700 nm
PS II: ……………….
PS II: ……………….
✅ Red light of 680 nm
03) Choose the only one growth inhibiting plant hormone among the following options:
(a) ABA (b) NAA (c) IAA (d) 2, 4-D
✅ (a) ABA
04) The stage between Meiosis I and Meiosis II is called ……………….
✅ Interkinesis
05) The name ‘Virus’ that means venom or poisonous fluid was given by .................
(a) Pasteur (b) Ivanowsky
(c) Beijerinck (d) Stanley
✅ (c) Beijerinck
II. Answer any 9 questions from 6 – 16. Each carries 2 scores. (9 x 2 = 18)
06) Match the following: 
✅ Answer
07) Differentiate between:
(a) Actinomorphic flowers and Zygomorphic flowers.
(b) Trimerous flowers and Tetramerous flowers.
✅ Answer
(a) Actinomorphic flowers (radial symmetry): Here, a flower can be divided into 2 equal radial halves in any radial plane.Zygomorphic (bilateral symmetry): Here, a flower can be divided into two similar halves only in a particular vertical plane.
(b) Trimerous flowers: Here, floral appendages are multiple of 3.
Tetramerous flowers: Here, floral appendages are multiple of 4.
08) Complete the following chart: 
✅ Answer
A= Chloroplasts B= LeucoplastsC= Amyloplasts D= Aleuroplasts
09) Given below is a diagram showing structure of a monocotyledonous seed. Label the parts marked as A, B, C and D. 
✅ Answer
A= Aleurone layer B= EndospermC= Scutellum D= Radicle
10) Give reason:
a) Photorespiration is a wasteful process.
b) Photorespiration does not occur in C4 plants.
✅ Answer
a) In Photorespiration, there is no synthesis of sugars, ATP and NADPH. So Photorespiration is a wasteful process.b) Photorespiration does not occur in C4 plants because they can increase CO2 concentration at the enzyme site. This takes place when C4 acid from the mesophyll is broken down in the bundle cells to release CO2. This minimises the oxygenase activity of RuBisCO.
11) Mention the drawbacks of fermentation.
✅ Answer
• Energy production is limited. Less than 7% of the energy in glucose is released and not all of it is trapped as high energy bonds of ATP.• Hazardous products (acid or alcohol) are formed.
12) Briefly explain sexual reproduction in Fungi.
✅ Answer
The sexual cycle involves the following three steps:(i) Fusion of protoplasm between two motile or non-motile gametes called plasmogamy.
(ii) Fusion of two nuclei called karyogamy.
(iii) Meiosis in zygote resulting in haploid spores
13) Compare the vascular bundles of dicot stem and monocot stem.
✅ Answer
Vascular bundles of dicot stem: Large in number. Conjoint & open. Their ring arrangement is a characteristic of dicot stem. Protoxylem is endarch.Vascular bundles of monocot stem: Many & Scattered. Conjoint & closed. Peripheral vascular bundles are smaller than central ones.
14) (a) Identify the types of chromosomes (X) and (Y). 
(b) What is Satellite?
✅ Answer
(a) (X) = Metacentric (Y) = Submetacentric(b) Some chromosomes have non-staining secondary constrictions at a constant location. It is called satellite.
15) (a) Mention the function of stomata.
(b) How does the shape of guard cells of dicot plants differ from that of monocot plants?
✅ Answer
(a) Stomata regulate the transpiration and gaseous exchange.(b) In dicot plants, guard cells of dicot plants are bean-shaped.
In monocot plants (grasses) they are dumbbell shaped.
16) (a) Define Blackman’s Law of Limiting Factors.
(b) How temperature affects the rate of photosynthesis?
✅ Answer
(a) “If a biochemical process is affected by more than one factor, its rate is determined by the factor nearest to its minimal value: it is the factor which directly affects the process if its quantity is changed.”(b) Dark reactions, being enzymatic, are temperature controlled.
The C4 plants respond to higher temperatures and show higher rate of photosynthesis.
C3 plants have a much lower temperature optimum.
III. Answer any 3 questions from 17 – 20. Each carries 3 scores. (3 x 3 = 9)
17) Observe the given stage of meiosis I. Identify it and write any two features. 
✅ Answer
Prophase I.Features: It is typically longer and more complex. It is subdivided into phases - Leptotene, Zygotene, Pachytene, Diplotene and Diakinesis.
The processes such as synapsis, crossing over, chiasmata formation etc. occur during Prophase I.
18) Some processes of photosynthesis are given below. Arrange them correctly in two-column table with suitable titles.
• Splitting of water
• Utilization of ATP and NADPH
• Biosynthesis of sugars
• Release of oxygen
✅ Answer
19) (a) Summary equation of Krebs’ cycle is given below. Complete it. Pyruvic acid + 4NAD+ + FAD+ + 2H2O + ADP+Pi
↓ Mitochondrial matrix
3CO2 + ……. + ……. + ……. + ……. (b) Mention the number of ATP molecules produced from
↓ Mitochondrial matrix
3CO2 + ……. + ……. + ……. + …….
(i) 1 NADH (ii) 1 FADH2
✅ Answer
(a) 3CO2 + 4NADH+ + 4H+ + FADH2 + ATP(b) (i) 3 ATP (ii) 2 ATP
20) Define the following:
(a) Respiratory climactic
(b) Bolting
(c) Heterophylly
✅ Answer
(a) Ethylene enhances the respiration rate during ripening of the fruits. This rise in rate of respiration is called respiratory climactic.(b) Bolting is the internode elongation just prior to flowering.
(c) Heterophylly is the presence of different types of leaves at different phases of life or due to different environments.
PART B: ZOOLOGY
I. Answer any 3 questions from 1 – 5. Each carries 1 score. (3 x 1 = 3)
01) Note the relationship between first two terms and fill up the fourth place.
Mangifera: Genus
indica: ……………….
✅ Species
02) Select the correct statement regarding with ECG of man.
i) P-wave represents auricular repolarization
ii) P-wave represents ventricular repolarization
iii) P-wave represents auricular depolarization
iv) P-wave represents ventricular depolarization
✅ iii) P-wave represents auricular depolarization.
03) Name a limbless amphibian.
✅ Ichthyophis
04) Enzymes that catalyze removal of groups by mechanisms other than hydrolysis leaving double bonds are called ……………….
✅ Lyases
05) The cortex extends in between the medullary pyramids as renal columns called ……………….
✅ Columns of Bertini
II. Answer any 9 questions from 6 – 16. Each carries 2 scores. (9 x 2 = 18)
06) Given below are various parts of the Frog’s excretory system. Prepare a flowchart that shows the correct sequence of urine conduction.
Urinary bladder
Cloacal aperture
Ureters
Kidneys
Cloaca
✅ Answer
Kidneys → Ureters → Urinary bladder → Cloaca → Cloacal aperture. 07) Complete the following table. 
✅ Answer
08) The intermediates or products of metabolic reactions are called Metabolites. Mention 2 types of metabolites with one example for each.
✅ Answer
i. Primary metabolites. E.g., amino acids, sugars etc.ii. Secondary metabolites. E.g., pigments, alkaloids etc.
09) Name the joint between:
a) Adjacent vertebrae
b) Skull bones
c) Atlas and axis
d) Carpal & metacarpal of thumb
✅ Answer
a) Cartilaginous (Slightly movable) jointsb) Fibrous (immovable) joints
c) Pivot joint
d) Saddle joint
10) In a class room discussion, your friend told that “Malpighian tubules are the kidneys of a cockroach.” How will you evaluate this statement?
✅ Answer
Considering the basic functions, I agree to this statement. Malpighian tubules in cockroaches serve to excrete metabolic waste and maintain osmotic balance, similar to the kidneys in higher organisms. 11) Analyze the following diagrams. 
a) Identify (a), (b) and (c).
b) How the labelled part A differs from B?
b) How the labelled part A differs from B?
✅ Answer
a) (a) Coelomate(b) Pseudocoelomate
(c) Acoelomate.
b) A is true coelom.
B is false coelom (pseudocoelom).
12) a) Identify the nitrogen bases A and B given below: 
b) Write the nucleotides of these nitrogen bases.
✅ Answer
a) A= Adenine B= Uracilb) Nucleotide of Adenine is Adenylic acid.
Nucleotide of Uracil is Uridylic acid.
13) Match column A with column B. 
✅ Answer
14) Complete the flow chart showing the regulation of kidney functioning by Juxta Glomerular Apparatus. 
✅ Answer
A= Renin B= Angiotensin IC= Aldosterone D= Rise in GFR
15) Observe the picture. 
a) Identify the animal and name the class to which this animal belongs.
b) Write any two characteristic features of this class.
✅ Answer
a) Animal = Chelone Class = Reptilia.b) Dry & cornified skin, Epidermal scales or scutes, Crawling mode of locomotion.
16) Name the four types of proteins present in muscle fibres.
✅ Answer
Actin, Myosin, Troponin and Tropomyosin.III. Answer any 3 questions from 17 – 20. Each carries 3 scores. (3 x 3 = 9)
17) Differentiate between:
a) IRV and ERV
b) IC and EC
c) RV and FRC
✅ Answer
a) Inspiratory reserve volume (IRV): Additional volume of air that can inspire by a forcible inspiration.Expiratory reserve volume (ERV): Additional volume of air that can expire by a forcible expiration.
b) Inspiratory capacity (IC): Total volume of air inspired after a normal expiration (TV + IRV).
Expiratory capacity (EC): Total volume of air expired after a normal inspiration (TV + ERV).
c) Residual volume (RV): Volume of air remaining in lungs after a forcible expiration.
Functional residual capacity (FRC): Volume of air remaining in the lungs after a normal expiration (ERV + RV).
18) a) Identify the below stages of nerve impulse conduction.
b) Name the ions involved in this process.
c) How first stage is maintained?
b) Name the ions involved in this process.
c) How first stage is maintained?
✅ Answer
a) (1) Stage of resting membrane potential (RMP).(2) Stage of Depolarisation.
b) Na+ and K+ ions.
c) It is maintained by the active transport of ions by the Na-K pump. It transports 3 Na+ outwards for 2 K+ into the cell. Thus, outer surface becomes positive charge and inner surface becomes negative charge.
19) Hormonal abnormality is responsible for certain diseases in man. List of some diseases are given below.
b) Name the diseases that are caused due to the overproduction of the hormones related to (ii) and (iv).
(i) Diabetes mellitusa) Specify which hormone deficiency causes these disorders.
(ii) Dwarfism
(iii) Diabetes insipidus
(iv) Cretinism
b) Name the diseases that are caused due to the overproduction of the hormones related to (ii) and (iv).
✅ Answer
(a) (i) insulin (ii) growth hormone (GH)(iii) ADH (iv) thyroxine
(b) Overproduction of GH causes Gigantism/ Acromegaly.
Overproduction of thyroxine causes Exophthalmic goitre.
20) “Metagenesis” is the characteristic Phenomenon of this phylum.
a) Identify the phylum.
b) Write any four other characteristics of this phylum.
c) Give one example of this phylum.
✅ Answer
(a) Cnidaria (Coelenterata)(b) i. Tentacles with cnidoblasts.
ii. Gastrovascular cavity (coelenteron) present.
iii. Polyp and medusa forms are present.
iv. Mouth is present on hypostome.
(c) Hydra.