Today, we are providing you Biology NEB Class 12 Question Paper 2080-2023 Code-9101 which examination was held on the year 2080/2023 and you can download the neb grade xii (12) Biology subject question paper of the year 2080-2023 in PDF format which is only for technical stream- regular students. Please check and download pdf file grade 12 Biology Exam question paper of the year 2023-2080 Nepal. The Exam Question provided below – Biology NEB Class 12 Question Paper 2080-2023 Code-9101 for the board exam 2079 and onwards. And it is based on the latest NEB Syllabus for 2079 and so on. We will be adding more Exam Question Papers of grade xii-class 12 later on. Scroll down to Download Biology NEB Class 12 Question Paper 2080-2023 Code-9101 in pdf format which is 784 kb in size. Enjoy!
Biology NEB Class 12 Question Paper 2080-2023 Code-9101.
NATIONAL EXAMINATIONS BOARD [NEB]
Biology – Grade XII-Class 12
Examination – 2080 (2023)
(New Course)
For Technical Stream- Regular Students.
Subject Code: 9101
Time – 3 hrs
Full Marks – 75
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Candidates are required to give their answers in their own words as far as practicable. The figures in the margin indicate full marks.
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Attempt all the questions.
Group – ‘A’ 11×1=11
Rewrite the correct options of each questions in your answer sheet.
1. Which tissue is called a living mechanical tissue?
(A) Parenchyma
(B) Aerenchyma
(C) Collenchyma
(D) Chlorenchyma
2. What is the genetic material composed of in most organisms?
(A) Proteins
(B) Carbohydrates
(C) Lipids
(D) Nucleic acids
3. Which of the following tissue has the light and dark bands alternately arranged?
(A) Striped
(B) Unstriped
(C) Involuntary
(D) Unstraited
4. What is the main end product of photosynthesis?
(A) ATP
(B) Carbon dioxide
(C) Water
(D) Glucose
5. What is meant by heterozygous genotype?
(A) Having two different alleles for a gene
(B) Having no alleles for a gene
(C) Having a dominant allele and a recessive allele for a gene
(D) Having two identical alleles for a gene
6. Which of the following function is related to sertoli cells?
(A) Formation of ova
(B) Nutrition to sperms
(C) Movement of sperms
(D) Formation of sperms
7. Which of the following is the organ transplantation between two genetically identical individuals?
(A) Autograft
(B) Xenograft
(C) Isograft
(D) Allograft
8. How can the accurate age of a tree be determined?
(A) Counting the number of branches
(B) Measuring the diameter of stem
(C) Counting the number of annual rings in the tree trunk
(D) Measuring the height of the tree
9. Which of the following sequence is in correct order?
(A) Malleus, stapes, incus
(B) Incus, stapes, malleus
(C) Malleus, incus, stapes
(D) Incus, stapes, malleus
9. If a woman is not able to produce the baby. What technique is used to solve this problem?
(A) Amniocentesis
(B) In-vitro fertilization
(C) Vaccination
(D) In-vivo-fertilization
10. Why is it rare for a girl to be colourblind ?
(A) Her mother and maternal grand father were colourblind
(B) Her father and maternal grand father were colourblind
(C) Her mother is colourblind and father has normal vision
(D) Parents have normal vision but grand parents were colourblind
Group ‘B’ 8×5=40
12. What is the difference between hypertonic, hypotonic and isotonic solutions and how do they affect the movement of water across a selectively permeable membrane ? 3+2
13. What is incomplete dominance ? Provide an example of a trait that shows incomplete dominance and explain how it is inherited ? 1+4
14. What is plasmolysis ? Point out its significances. 1+4
15. Draw a labelled diagram of T.S. of dicot stem and compare it with that of monocot stem. 3+2
16. Digestive, respiratory and circulatory systems in human beings are interrelated. Applying your understanding how all these systems work together for normal physiology ? 5
Or
Identify the hormones released by adrenal cortex. In what ways these hormones are useful to the human body. 2+3
17. Compare and contrast areolar and adipose tissues. 2.5+2.5
18. What is diffusion ? Compare it with that of osmosis. 1+4
19. How can biotechnology be applied in medicine and agriculture and analyze the potential benefits and drawbacks of using biotechnology in these fields.
Group ‘C’ 8×3=24
20. What is amniocentesis ? Why is it done ? Explain the procedure of amniocentesis. 1+1+6
21. Due to metabolic activities, toxic substances are formed in the body. Identify these substances. Draw a labelled diagram and explain the excretory organs of human beings. 2+2+4
22. Explain the process of semi-conservative replication of DNA with necessary diagrams. How does replication contribute to the accurate transmission of genetic information from one generation to the next generation. 6+2
Or
Discuss the different types of gene mutation and their effects on the genetic make up of an organism. Evaluate the positive and negative impacts of gene mutations and chromosomal mutations on the organisms. 4+4