Sub. code 301
NEB — GRADE XI
2077 CDC
Model Question
Class 11 Biology Model Question 2077 CDC
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, 2077 CDC (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
Circle the correct answer from the given alternatives.
Identify the correct bonding between nitrogen bases in DNA molecule from given pair.
Miller and Urey designed an experiment and try to recreate the environment of primitive earth to support the theory of biochemical origin of life. Which composition he has used to produce simple amino acids?
a. Ammonia, Hydrogen, Nitrogen, and water vapour
b. Ammonia, Methane, Hydrogen, and water vapour
c. Ammonia, Oxygen, Carbon dioxide, and waster vapour
d. Ammonia, Nitrogen, Oxygen, and water vapour
Which habitat is needed for xerophytic plants to survive?
a. habitat with dry condition
b. warm habitat
c. habitat like desert
d. habitat with little water
"Red rust is one of the destructive diseases in tea plants which results adverse effect on tea yield. It is caused by a type of algae." Which discipline of Biology is related to explain the above statement?
a. Mycology
b. Agronomy
c. Pathology
d. Phycology
Which of the following is a practice of in-situ conservation of biodiversity?
a. Botanical garden
b. Wildlife sanctuary
c. Zoo
d. Seed bank
Which one statement of the following tells the favor of prop root?
a. It has the function of support
b. It has the function of absorption
c. It has the function of fixation
d. It has the function of conduction
Forelimbs (wings) of Dragon fly, Pteranodon, Hawk and Bat are given, What type of organs are these?
a. Homologous
b. Atavism
c. Analogous
d. Vestigial
Which is the nearest ancestor of modern man?
a. Homo sapiens neanderthalensis
b. Homo sapiens
c. Homo erectus
d. Homo erectus pekinensis
In the given figure, X denotes an organ of the frog, which produces a particular sound. What does that sound indicate?
a. Danger
b. Hunger
c. Excitement
d. Sex appeal
Trichocysts is an important organelle in Paramecium, which activities does it associate for?
a. Defense, offence, and adhesion
b. Defense, reproduction, and nutrition
c. Offence, osmoregulation, and defense
d. Adhesion, osmoregulation, and reproduction
IUCN noticed the one horned rhino restricted in Chitwan national park of Nepal as high risk group. Its population has declined due to habital loss, excessive poaching, low rate of breeding, human encroachment and other descendent factors. According to this description, in which risk group does one horned rhino of Nepal notice.
a. Near endangered
b. Critically endangered
c. Endangered
d. Least endangered
Group B
Give short answer to the following questions.
Write any five characteristics of Chlorophyceae.
'Gymnosperm is an advanced group than Pteridophyta'. Justify this statement with any five points.
Compare between simple fruit and multiple fruit in two points. How can fruit play an important role for continuity of generation in plant life?
How can ecological factors influence in pond ecosystem? Discuss it with suitable examples with respect to its structural and functional aspects.
Explain any five ways. How microorganisms play an important role in the field of medicine?
The excessive and unbalance use of pesticides is one of the prominent environmental issue since last few years in Nepal. Mention any three consequences of over use of pesticides in your locality and suggest awareness campaign that you have follow in two points.
What is transverse binary fission? Write its process in Paramecium.
How can pancreas of a frog play an important role in digestion? Explain it in reference to physiology of intestinal digestion.
Describe with suitable diagram, how copulation and cocoon formation takes place in earthworm.
How does Darwinism explain the theory of organic evolution? Clarify your answer.
Group C
Give long answer to the following questions.
Why is sexual reproduction important in lower grade plant like fungi? Explain it with respect to sexual reproduction of Yeast along with diagram.
Explain the diagnostic floral characters of family Solanaceae with floral formula and floral diagram. Write the botanical name of any two plants of this family regarding medicinal and edible values.
Paper Overview & Analysis
2077 CDC
Year
Model Question
Type
75
Full Marks
32
Pass Marks
3 Hours
Duration
20
Question Items
Question Type Breakdown
Group Breakdown