GOVERNMENT OF KARNATAKA
KARNATAKA SCHOOL EXAMINATION AND ASSESSMENT BOARD
6TH CROSS, MALLESHWARAM, BENGALURU – 560 003
2025 -26 II PU MODEL QUESTION PAPER –1 ANSWERED
SUBJECT: BIOLOGY (36) MAXIMUM MARKS: 70
TIME: 03 HOURS NUMBER OF QUESTIONS: 44
PART – A
I. Select the correct alternative from the choices given below: 15 x 1 = 15
1. Statement I: Pollination does not guarantee the transfer of right type of pollen
Statement II: Compatible pollen – pistil interaction guarantee double fertilization (Pg 15/16, D)
a) Both statements I and statement II are correct
b) Both statement I and statement II are incorrect
c) Statement I is correct but statement II is incorrect
d) Statement I is incorrect but statement II is correct
2. The secondary oocyte formation from primary oocyte occurs in which of the follicle? (pg 32, A)
a) Primary b) Secondary
c) Tertiary d) Graafian
3. Progenies with AB and O blood groups are not possible from which of the following mating
parents? (Pg 61, D)
a) O x AB b) AB x B c) AB x AB d) AB x A
4. Another chemical name for the nitrogenous base thymine is (Pg 81, E)
a) 2-Methyl uracil b) 3- Methyl uracil
c) 4-Methyl uracil d) 5- Methyl uracil
5. Select the correct match: (Pg118, A)
Australian marsupials Placental mammals
a) Spotted cuscus Flying squirrel
b) Spotted cuscus Bobcat
c) Spotted cuscus Anteater
d) Spotted cuscus Lemur
6. Which of these ancient men protected their body with hide and buried their dead? (9Q, E)
a) Homo habilis b) Neanderthal
c) Dryopithecus d) Homo erectus
7. Human Immuno Deficiency virus replicates in (Pg 140, A)
a) B - cells b) NK– cells
c) Helper T - cells d) PMNL
8. The drug which is depressant and slowdown body function is (15Q, E)
a) Smack b) Crack
c) Hashish d) Charas
9. Saccharomyces cerevisiae commonly called brewer’s yeast is used for fermenting malted (Pg 152, E)
a) Pulses b) Cereals c) Fruits d) Vegetables
2025-26 II PU BIOLOGY (36) MODEL QUESTION PAPER -1 answered Page 1 of 9
, 10. In the year 1963, the two enzymes responsible for restricting the growth of bacteriophage in E. coli
were isolated. One of them cut DNA and the other added the group (Pg 165, E)
a) Methyl b) Ethyl c) Phosphate d) Hydroxyl
11. Which of the following is the correct representation of primer annealing step in PCR? (Pg 172, A)
d)
12. Given below are steps in the gene therapy of a patient with Adenosine deaminase (ADA) deficiency
I. Lymphocytes are grown in a culture outside the human body
II. Lymphocytes are altered with a functional ADA gene
III. Lymphocytes are collected from the blood of the patients
IV. The genetically modified lymphocytes are infused back into the patient
Which of the following show the correct order that those steps must occur? (Pg 182, A)
a) II – I – III – IV b) III – IV – II – I
c) III – I – II – IV d) IV – III – I – II
13. The organisms that reproduce only once in their life time (Pg 196, E)
a) Oysters b) Pelagic fish
c) Salmon fish d) Hippocampus
14. The decomposers especially abundant in the bottom of the pond are (Pg 206, E)
a) Only fungi b) Only bacteria
c) Only fungi and bacteria d) Flagellates, fungi, bacteria
15. The IUCN Red list (2004) documented the extinction of species in the last 500 years include (Pg 221, E)
a) 847 b) 784 c) 874 d) 478
II. Fill in the blanks by choosing the appropriate word/Words from those given below: 5x1=5
(Amoebiasis, richness, Nostoc, ovulation, colostrum, diversity)
16. The initial few days of milk produced after parturition is Colostrum (Pg 38, E)
17. Oral pills as contraceptive effectively function by inhibiting ovulation. (Pg 45, E)
18. Symptoms of constipation, abdominal pain and cramps associated with disease Amoebiasis. (QB, E)
19. Cyanobacteria is an autotrophic microbe widely distributed in aquatic and terrestrial habitats can fix
atmospheric nitrogen is Nostoc. (QB, E)
20. Alexander Van Humboldt observed that within a region, species richness increased with increasing
explored area but up to certain limit. (Pg 220, E)
2025-26 II PU BIOLOGY (36) MODEL QUESTION PAPER -1 answered Page 2 of 9
, PART - B
III. Answer any FIVE of the following questions in 3 – 5 sentences wherever applicable: 5 x 2 = 10
21. Draw a labeled diagram of mature 2 celled pollen grain (Pg 7, E)
22. Mention any four assisted reproductive technique that can be advised to couples with infertility
problems. (15Q, E)
IVF – ET
ZIFT
GIFT
ICSI
IUI
AI
23. Recombinants obtained in both Mendelian and Morgan experiment. Yet, the processes involved are
different comment. (Pg 64/68, A)
Recombinants obtained in Mendelian experiment are due to Independent assortment as the genes are
located on different chromosomes (non-homologous)
Recombinants obtained in Morgan experiment are due to crossing over as the genes are located on the
same chromosome (homologous)
24. Name the methodologies used in Human genome sequencing. (62Q, E)
Expressed sequence Tags (ESTs)
Sequence annotations
25. Name the evolution of any two plant forms through geological periods from tracheophyte ancestors.
(Pg 122, A)
Rhynia type plants
Zosterophyllum
Arborescent lycopods
Herbaceous lycopods
26. Describe briefly the primary treatment of sewage (16Q, E)
It involves the sequential filtration and sedimentation. Sequential filtration removes floating debris and
the grit is removed by sedimentation.
The fluid component is called the primary effluent and the solid component is called primary sludge.
27. Differentiate between ex-situ and in-situ conservation. (22Q, A)
Conservation of the life forms outside their natural or original habitats (off site) in the special setting is
called ex-situ conservation
Conservation of the life forms in their natural or original habitats (on site) is called in-situ conservation
2025-26 II PU BIOLOGY (36) MODEL QUESTION PAPER -1 answered Page 3 of 9
KARNATAKA SCHOOL EXAMINATION AND ASSESSMENT BOARD
6TH CROSS, MALLESHWARAM, BENGALURU – 560 003
2025 -26 II PU MODEL QUESTION PAPER –1 ANSWERED
SUBJECT: BIOLOGY (36) MAXIMUM MARKS: 70
TIME: 03 HOURS NUMBER OF QUESTIONS: 44
PART – A
I. Select the correct alternative from the choices given below: 15 x 1 = 15
1. Statement I: Pollination does not guarantee the transfer of right type of pollen
Statement II: Compatible pollen – pistil interaction guarantee double fertilization (Pg 15/16, D)
a) Both statements I and statement II are correct
b) Both statement I and statement II are incorrect
c) Statement I is correct but statement II is incorrect
d) Statement I is incorrect but statement II is correct
2. The secondary oocyte formation from primary oocyte occurs in which of the follicle? (pg 32, A)
a) Primary b) Secondary
c) Tertiary d) Graafian
3. Progenies with AB and O blood groups are not possible from which of the following mating
parents? (Pg 61, D)
a) O x AB b) AB x B c) AB x AB d) AB x A
4. Another chemical name for the nitrogenous base thymine is (Pg 81, E)
a) 2-Methyl uracil b) 3- Methyl uracil
c) 4-Methyl uracil d) 5- Methyl uracil
5. Select the correct match: (Pg118, A)
Australian marsupials Placental mammals
a) Spotted cuscus Flying squirrel
b) Spotted cuscus Bobcat
c) Spotted cuscus Anteater
d) Spotted cuscus Lemur
6. Which of these ancient men protected their body with hide and buried their dead? (9Q, E)
a) Homo habilis b) Neanderthal
c) Dryopithecus d) Homo erectus
7. Human Immuno Deficiency virus replicates in (Pg 140, A)
a) B - cells b) NK– cells
c) Helper T - cells d) PMNL
8. The drug which is depressant and slowdown body function is (15Q, E)
a) Smack b) Crack
c) Hashish d) Charas
9. Saccharomyces cerevisiae commonly called brewer’s yeast is used for fermenting malted (Pg 152, E)
a) Pulses b) Cereals c) Fruits d) Vegetables
2025-26 II PU BIOLOGY (36) MODEL QUESTION PAPER -1 answered Page 1 of 9
, 10. In the year 1963, the two enzymes responsible for restricting the growth of bacteriophage in E. coli
were isolated. One of them cut DNA and the other added the group (Pg 165, E)
a) Methyl b) Ethyl c) Phosphate d) Hydroxyl
11. Which of the following is the correct representation of primer annealing step in PCR? (Pg 172, A)
d)
12. Given below are steps in the gene therapy of a patient with Adenosine deaminase (ADA) deficiency
I. Lymphocytes are grown in a culture outside the human body
II. Lymphocytes are altered with a functional ADA gene
III. Lymphocytes are collected from the blood of the patients
IV. The genetically modified lymphocytes are infused back into the patient
Which of the following show the correct order that those steps must occur? (Pg 182, A)
a) II – I – III – IV b) III – IV – II – I
c) III – I – II – IV d) IV – III – I – II
13. The organisms that reproduce only once in their life time (Pg 196, E)
a) Oysters b) Pelagic fish
c) Salmon fish d) Hippocampus
14. The decomposers especially abundant in the bottom of the pond are (Pg 206, E)
a) Only fungi b) Only bacteria
c) Only fungi and bacteria d) Flagellates, fungi, bacteria
15. The IUCN Red list (2004) documented the extinction of species in the last 500 years include (Pg 221, E)
a) 847 b) 784 c) 874 d) 478
II. Fill in the blanks by choosing the appropriate word/Words from those given below: 5x1=5
(Amoebiasis, richness, Nostoc, ovulation, colostrum, diversity)
16. The initial few days of milk produced after parturition is Colostrum (Pg 38, E)
17. Oral pills as contraceptive effectively function by inhibiting ovulation. (Pg 45, E)
18. Symptoms of constipation, abdominal pain and cramps associated with disease Amoebiasis. (QB, E)
19. Cyanobacteria is an autotrophic microbe widely distributed in aquatic and terrestrial habitats can fix
atmospheric nitrogen is Nostoc. (QB, E)
20. Alexander Van Humboldt observed that within a region, species richness increased with increasing
explored area but up to certain limit. (Pg 220, E)
2025-26 II PU BIOLOGY (36) MODEL QUESTION PAPER -1 answered Page 2 of 9
, PART - B
III. Answer any FIVE of the following questions in 3 – 5 sentences wherever applicable: 5 x 2 = 10
21. Draw a labeled diagram of mature 2 celled pollen grain (Pg 7, E)
22. Mention any four assisted reproductive technique that can be advised to couples with infertility
problems. (15Q, E)
IVF – ET
ZIFT
GIFT
ICSI
IUI
AI
23. Recombinants obtained in both Mendelian and Morgan experiment. Yet, the processes involved are
different comment. (Pg 64/68, A)
Recombinants obtained in Mendelian experiment are due to Independent assortment as the genes are
located on different chromosomes (non-homologous)
Recombinants obtained in Morgan experiment are due to crossing over as the genes are located on the
same chromosome (homologous)
24. Name the methodologies used in Human genome sequencing. (62Q, E)
Expressed sequence Tags (ESTs)
Sequence annotations
25. Name the evolution of any two plant forms through geological periods from tracheophyte ancestors.
(Pg 122, A)
Rhynia type plants
Zosterophyllum
Arborescent lycopods
Herbaceous lycopods
26. Describe briefly the primary treatment of sewage (16Q, E)
It involves the sequential filtration and sedimentation. Sequential filtration removes floating debris and
the grit is removed by sedimentation.
The fluid component is called the primary effluent and the solid component is called primary sludge.
27. Differentiate between ex-situ and in-situ conservation. (22Q, A)
Conservation of the life forms outside their natural or original habitats (off site) in the special setting is
called ex-situ conservation
Conservation of the life forms in their natural or original habitats (on site) is called in-situ conservation
2025-26 II PU BIOLOGY (36) MODEL QUESTION PAPER -1 answered Page 3 of 9
