Sub. code 301
NEB — GRADE XI
Set D
Model Question
Class 11 Biology Model Question Set D
The candidates are required to give their answers in their own words as far as practicable. The figures in the margin indicate full marks.
Pass Marks : 32
सबै प्रश्नको उत्तर दिनुहोस् । (Attempt All Questions)
This model question paper is for Class 11 Biology, Set D (subject code 301), carrying full marks of 75 with a pass mark of 32, to be completed within 3 Hours. Model answers are available for questions that have one — reveal them with a free account (a few reveals) or a paid plan (unlimited).
Group A
Multiple Choice Questions
Which of the following biomolecules acts as a primary energy currency in cellular metabolism?
a. DNA
b. ATP
c. Cellulose
d. Phospholipid
The branch of biology that deals with the study of fungi is known as:
a. Phycology
b. Mycology
c. Bryology
d. Virology
Which of the following microorganisms is commonly used as a vector in genetic engineering and biotechnology?
a. Amoeba proteus
b. Escherichia coli
c. Paramecium caudatum
d. Plasmodium vivax
The total dry weight of organic matter per unit area at a specific time in an ecosystem is referred to as:
a. Biomass
b. Standing crop
c. Trophic level
d. Productivity
Which of the following is an example of ex-situ conservation?
a. National Park
b. Wildlife Sanctuary
c. Botanical Garden
d. Conservation Area
What is the main scope of Biology that deals with the identification, nomenclature, and classification of organisms?
a. Physiology
b. Taxonomy
c. Ecology
d. Morphology
Wings of a butterfly and wings of a bird are classic examples of:
a. Homologous organs
b. Vestigial organs
c. Analogous organs
d. Atavistic organs
Which protozoan parasite causes malaria in humans?
a. Entamoeba histolytica
b. Plasmodium
c. Trypanosoma gambiense
d. Paramecium caudatum
Which behavioral adaptation is commonly observed in ectothermic animals (like amphibians and reptiles) during extremely cold winter conditions?
a. Estivation
b. Hibernation
c. Migration
d. Mimicry
Which protected area of Nepal is famous for the conservation of the Red Panda?
a. Chitwan National Park
b. Sagarmatha National Park
c. Langtang National Park
d. Bardia National Park
During karyokinesis in plant cells, the spindle fibers attach to which specialized structure on chromosomes?
a. Telomere
b. Centromere (Kinetochore)
c. Satellite
d. Nucleolus
Group C
Give short answers to the following questions.
Differentiate between prokaryotic and eukaryotic cells with any five points.
Write down any five distinguishing characters of Angiosperms.
Explain the types of placentation found in flowering plants with suitable examples.
What is ecological succession? Describe the main stages of hydrarch succession (hydrosere).
Discuss the harmful and beneficial activities of bacteria in daily human life.
What are the major causes of environmental pollution in Nepal? Suggest three management strategies.
Describe the structure of a macronucleus and micronucleus in Paramecium, highlighting their functional differences.
Describe the alimentary canal of an earthworm with a neat descriptive layout.
Explain the external features and respiratory mechanism of a frog.
State Lamarck's theory of organic evolution and explain its main postulates with criticisms.
Group C
Give long answers to the following questions.
Give a detailed account of diagnostic floral characteristics, floral formula, and economic importance of family Fabaceae (Leguminosae).
Explain the life cycle of Plasmodium in mosquito.
Cell division is a fundamental biological process. Compare mitosis and meiosis cell division with respect to their occurrence, stages, genetic variation, and chromosome number changes.
Discuss the sources and effects of air pollution in an environment.
Paper Overview & Analysis
Set D
Year
Model Question
Type
75
Full Marks
32
Pass Marks
3 Hours
Duration
22
Question Items
Question Type Breakdown
Group Breakdown
Chapter Breakdown
| Biomolecules and cell biology | 4 items | 15 marks |
| Faunal diversity | 3 items | 11 marks |
| Biota and environment | 3 items | 14 marks |
| Floral diversity | 2 items | 6 marks |
| Introductory microbiology | 2 items | 6 marks |
| Ecology | 2 items | 5 marks |
| Evolutionary biology | 2 items | 6 marks |
| Vegetation | 1 item | 1 mark |
| Introduction to biology | 1 item | 1 mark |
| Conservation biology | 1 item | 1 mark |
1 question item offered alternative ("OR") chapters and isn't attributed to either, since only one could be attempted.