SAMPLE PAPER FOR HIGH SCHOOL
BIOLOGY (2024-25)
CLASS- XI
TIME ALLOWED: 3 HRS MAX. MARKS: 70
GENERAL INSTRUCTIONS:
All questions are compulsory.
The question paper has five sections and 33 questions. All questions are compulsory.
Section–A has 16 questions of 1 mark each; Section–B has 5 questions of 2 marks
each; Section– C has 7 questions of 3 marks each; Section– D has 2 case-based
questions of 4 marks each; and Section–E has 3 questions of 5 marks each.
There is no overall choice. However, internal choices have been provided in some
questions. A student has to attempt only one of the alternatives in such questions.
Wherever necessary, neat and properly labelled diagrams should be drawn.
Section- A
Q1 Respiratory process is regulated by certain specialized centers in the brain. One 1
of the following centres can reduce the inspiratory duration upon stimulation:
a-Medullary inspiratory centre b-Pneumotaxiccentre
c-Apneusticcentre d-Chemosensitivecentre
Q2 Which of the following suffixes used for units of classification in plants 1
indicates a taxonomic category of family?
a-Ales b-Onae
c-Aceae d-Ae
Q3 Identify the different types of placentations shown in figure and select the 1
correct option:
A. B. C. D E
a- Axile. Marginal. Free Parietal. Basal
central.
b- Marginal Basal. Axile. Free Parietal
central
c- Marginal Axile Parietal Free Basal
Central
d-Marginal Parietal Axile Basal Free -central
Q4 Arrangement of microtubule in a flagellum and a centriole is respectively 1
a- 9+2 and 9+1 b- 9+0 and 9+2
c- 9+1 and 9+0 d- 9+2 and 9+0
Q5 Zygotene of prophase-I is characterized by: 1
a- Chromosomes b-Synaptonemal complex
b- Crossing over d-Terminalization of chiasmata
Q6 Enzyme catalyze the biochemical reactions by……………the activation energy: 1
a- Lowering b-Increasing c-Unaltering d-Either a or b
Q7 Adenosine, guanosine, thymidine, uridine, cytidine, are all ………………. but 1
adenylic acid, uridylic acid, Cytidylic acid are………………….
1
BIOLOGY (2024-25)
CLASS- XI
TIME ALLOWED: 3 HRS MAX. MARKS: 70
GENERAL INSTRUCTIONS:
All questions are compulsory.
The question paper has five sections and 33 questions. All questions are compulsory.
Section–A has 16 questions of 1 mark each; Section–B has 5 questions of 2 marks
each; Section– C has 7 questions of 3 marks each; Section– D has 2 case-based
questions of 4 marks each; and Section–E has 3 questions of 5 marks each.
There is no overall choice. However, internal choices have been provided in some
questions. A student has to attempt only one of the alternatives in such questions.
Wherever necessary, neat and properly labelled diagrams should be drawn.
Section- A
Q1 Respiratory process is regulated by certain specialized centers in the brain. One 1
of the following centres can reduce the inspiratory duration upon stimulation:
a-Medullary inspiratory centre b-Pneumotaxiccentre
c-Apneusticcentre d-Chemosensitivecentre
Q2 Which of the following suffixes used for units of classification in plants 1
indicates a taxonomic category of family?
a-Ales b-Onae
c-Aceae d-Ae
Q3 Identify the different types of placentations shown in figure and select the 1
correct option:
A. B. C. D E
a- Axile. Marginal. Free Parietal. Basal
central.
b- Marginal Basal. Axile. Free Parietal
central
c- Marginal Axile Parietal Free Basal
Central
d-Marginal Parietal Axile Basal Free -central
Q4 Arrangement of microtubule in a flagellum and a centriole is respectively 1
a- 9+2 and 9+1 b- 9+0 and 9+2
c- 9+1 and 9+0 d- 9+2 and 9+0
Q5 Zygotene of prophase-I is characterized by: 1
a- Chromosomes b-Synaptonemal complex
b- Crossing over d-Terminalization of chiasmata
Q6 Enzyme catalyze the biochemical reactions by……………the activation energy: 1
a- Lowering b-Increasing c-Unaltering d-Either a or b
Q7 Adenosine, guanosine, thymidine, uridine, cytidine, are all ………………. but 1
adenylic acid, uridylic acid, Cytidylic acid are………………….
1
