HSC Science (General)
Academic Year: 2024-2025
Date & Time: 5th July 2025, 11:00 am
Duration: 3h
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General Instructions:
The question paper is divided into four sections.
- Section A: Q. No. 1 contains Ten multiple choice type of questions carrying one mark each. Evaluation will be done for the first attempt only.
Q. No. 2 contains Eight very short answer type of questions carrying one mark each. - Section B: Q. No. 3 to 14 are short answer type of questions carrying two marks each. (Attempt any Eight)
- Section C: Q. No. I5 to 26 are short answer type of questions carrying three marks each. (Attempt any Eight)
- Section D: Q. No. 27 to 31 are long answer type of questions carrying four marks each. (Attempt any Three)
- Begin the answer of each section on a new page.
The number of base pairs present around a histone octamer of nucleosome is ______.
200
146
54
20
Chapter:
Which of the following is NOT a sensory nerve?
I
II
III
IV
Chapter:
Which of the following biofertilizers is used by farmers to increase the yield of rice crop?
Azotobacter
Azospirillum
Bacillus
Azolla
Chapter:
Connecting link between amphibians and reptiles is ______.
Archaeopteryx
Australopithecus
Seymouria
Ichthyosaurus
Chapter:
The type of gene interaction deviating from Mendel’s findings of 3 : 1 to 1 : 2 is ______.
Incomplete dominance
Codominance
Multiple alleles
Pleiotropy
Chapter:
Identify initiation codon of mRNA from the following.
UAA
AUG
UAG
UGA
Chapter:
Identify the type of association between orchid growing as an epiphyte on branch of mango tree.
Parasitism
Amensalism
Commensalism
Mutualism
Chapter:
Which of the following substances protects pollen grains from chemicals?
Pectin
Hemicellulose
Cellulose
Sporopollenin
Chapter:
The part of antibody which binds with the specific antigen to form antigen-antibody complex is ______.
Paratopes
Isotopes
Epitopes
Octamer
Chapter:
Which genes are used for improvement of oil content and oil quality in plants?
Phytase gene
Arabidopsis gene
Holandric gene
Oncogene
Chapter:
Give term for “The total genetic information encoded in sum total of genes in a Mendelian population.”
Chapter:
Name the process in which swelling of hydrophilic colloids occur due to adsorption of water.
Chapter:
Give the term for the condition in which the number of WBCs in blood decreases below normal.
Chapter:
What is the term, when nucleotides on DNA strands shows the following sequence of base pairs.
3’ ______ CTT AAG ______ 5’
5’ ______ GAA TTC ______ 3’
Chapter:
Identify ‘A’ from the graph given below showing species area relationship:
Chapter:
Name the disorder in which deficiency of ADH leads to reduced water reabsorption and increase in urine output.
Chapter:
Name the permanent birth control method in which the fallopian tube is tied and cut.
Chapter:
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Name the long term storage places of carbon in the form of rocks and fossil fuels which are away from carbon cycle.
Chapter:
Give any two reasons why breathing through nose is beneficial than through mouth.
Chapter:
Mention any two molecular evidences of evolution.
Chapter:
Identify the disorder showing the following symptoms:
Constriction of bronchioles, mucus build up in bronchioles, periodic wheezing, difficulty in breathing.
Chapter:
Identify the disorder showing the following symptoms:
Inflammation of sinuses and mucous discharge.
Chapter:
Draw a neat and proportionate diagram of root hair and label mitochondria, nucleus and vacuole.
Chapter:
Enlist the types of chromosomes on the basis of position of centromere.
Chapter:
List any three drawbacks of Darwinism.
Chapter: [5] Origin and Evolution of Life
Write appropriate equations to represent Ammonification.
Chapter:
Chapter:
Differentiate between Inspiration and Expiration with respect to position of diaphragm and working of intercostal muscles.
Chapter:
Mention any four characteristics of 15 to 17 years age group.
Chapter:
Identify A, B and C from the given diagram of Graafian follicle and mention their significance:
Chapter:
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Write the name and position of any three valves in human heart.
Chapter:
Describe any three chemical defence mechanisms in plants against herbivores in population interaction.
Chapter:
Describe the development of male gametophyte from microspore.
Chapter:
Draw a well labelled diagram of male gametophyte of angiosperms.
Chapter:
Define decomposition.
Chapter: [14] Ecosystems and Energy Flow
Describe the processes and products of decomposition.
Chapter:
Give deficiency symptoms of the following element in plants:
Potassium (K+)
Chapter:
Give deficiency symptoms of the following element in plants:
Magnesium (Mg++)
Chapter:
Give deficiency symptoms of the following element in plants:
Boron
Chapter:
Give the scientific name of the sugarcane variety native to North India.
Chapter:
Give the scientific name of the sugarcane variety native to South India.
Chapter:
Name the centre in India which has developed sugarcane varieties containing high sugar.
Chapter:
With appropriate terms, complete the following chart and rewrite it:
| Sr. No. | Disorder/Diseases health Condition | Recombinant Protein (s) |
| i. | Parturition | |
| ii. | Emphysema | |
| iii. | Hepatitis B vaccine |
Chapter:
Mention any two major types of air pollutants. Add a note on their ill effects on human health.
Chapter:
Explain the different types of endosperms in angiosperms.
Chapter: [1] Reproduction in Lower and Higher Plants
Draw a diagram of the microscopic structure of human sperm. Label the following parts in it and write their functions:
- Acrosome
- Nucleus
- Middle piece
Chapter: [2] Reproduction in Lower and Higher Animals
Describe the transcription of hnRNA to mRNA in Eukaryotes.
Chapter:
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