Sub. code 2021
NEB — GRADE XII
2082 GIE Set A
Old Question
Class 12 Biology Old Question 2082 GIE Set A
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 old question paper is for Class 12 Biology, 2082 GIE Set A (subject code 2021), 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 (Botany)
Rewrite the correct option of each question in your answer sheet
What happens during fertilization in flowering plants?
Pollen grains are transferred to the stigma.
The ovule develops into a fruit.
The male and female gametes fuse to form a zygote.
The ovary releases microspores.
Which of the following is the end product of glycolysis?
Ethanol
Lactic acid
Pyruvic acid
Acetyl CoA
What is the most likely consequence if a mutation converts a sense codon into a stop codon?
Translation would terminate prematurely.
The polypeptide would be longer than normal.
The ribosome would be unable to initiate translation.
The mRNA would degrade before translation starts.
A gardener observes that the trunk of a dicot tree is increasing in thickness. Which of the following tissues play a key role in this secondary growth?
Epidermis and phloem
Vascular cambium and cork cambium
Xylem and pericycle
Cortex and endodermis
A farmer wants to grow larger seedless fruits. Which hormone should he/she use?
Auxin
Cytokinin
Gibberellin
Abscisic acid
Group B (Botany)
short answer question
Differentiate between monocot and dicot stems with respect to their anatomical features.
The diagram shows the process of fertilization in an angiosperm. Answer the following questions.
Label structure A and B.
Describe the process of double fertilization and triple fusion when the pollen tube carries gametes into the embryo sac.
What is the role of triple fusion and double fertilization?
Mutations play both positive and negative roles in various fields. Explain their significance with real-life examples, highlighting both beneficial and harmful effects.
You are given seeds for germination. Briefly describe the key factors that influence normal seed germination. How would exposing the seeds to low temperatures affect the germination process?
Critically examine how plant breeding through hybridization enhances agricultural sustainability by exploring its process and significance.
Group C (Botany)
long answer question
Under certain environmental conditions, plants need to maximize their ability to capture light energy efficiently. Describe the process of photosynthesis and explain the role of chlorophyll pigments in this process. Using your understanding of the non-cyclic electron transport system, explain how ATP and NADPH₂ are generated to support the dark reaction.
Mendel's dihybrid cross experiment led to the discovery of the law of independent assortment. State this law. Perform a cross between two heterozygous pea plants for both seed shape and seed color (RrYy × RrYy) up to the second filial generation using a Punnett square. Predict the phenotypic and genotypic ratios of the offspring and explain how these ratios support this law.
Explain how red and white eye colour is inherited as an X-linked trait in Drosophila melanogaster. Illustrate the inheritance of eye colour using suitable genetic crosses and analyze the resulting phenotypic outcomes. Based on your analysis, justify why this pattern is an example of criss-cross inheritance.
Group A (Zoology)
Rewrite the correct option of each question in your answer sheet
Which one of the following cell is present in areolar tissue?
Mast cell
Chondrocytes
Peptic cell
Microglial cell
Which of the following stage explains over-growth of micromere cells over megameres?
Morulation
Epiboly
Imboly
Cleavage
Which of the following enzyme digest carbohydrate in duodenum?
Lipase
Pepsin
Trypsin
Amylase
A few people are trapped in a small room with poor ventilation. After sometime, their breathing become hard and difficult. What is the most likely cause?
Decreased nitrogen level in room
Decreased nitrogen in alveoli
Accumulation of carbon-dioxide in room
Over-expansion of alveoli
Which of the following is the correct matching pair?
Sedative – Diazepam
Hallucinogen – Caffeine
Stimulant – Morphine
Barbiturates – Natural drug
Which of the following male reproductive organ secretes fructose?
Testis
Seminal vesicle
Cowper’s gland
Prostate gland
Group B (Zoology)
short answer question
Compare and contrast cartilage and bone.
Describe the process of spermatogenesis and its stages with the help of schematic diagram.
What is sexing in poultry farming? How would poultry farming help to uplift economy of nation?
Study the given figure and answer the questions that follow:
Label A, B, C, D.
Write the function of A
Write any enzyme that is released from B or C.
Enlist any four renal disorders. If any family member suffers from such disorder, what lifestyle modifications would you suggest to manage this condition?
Group C (Zoology)
long answer question
Describe causative agent, mode of infection, symptoms and control measures of Candidiasis.
Human brain controls every function of the body. Most of the functional areas are located in cerebrum of fore brain. Describe the structure of cerebrum. In what ways cerebrum differ from cerebellum?
What is ionic theory? How does an impulse travel in a nerve fibre, explain its mechanism? How does impulse transmit through synapse?
Paper Overview & Analysis
2082 GIE Set A
Year
Old Question
Type
75
Full Marks
32
Pass Marks
3 Hours
Duration
27
Question Items
Question Type Breakdown
Group Breakdown