HSC Science (General)
Academic Year: 2022-2023
Date & Time: 31st July 2023, 11:00 am
Duration: 3h
Advertisements
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.
- For each multiple choice type of question, it is mandatory to write the correct answer along with its alphabet. eg. (a)...../ (b)....../ (c) ....../ (d) ...... No mark(s) shall be given if ONLY the correct answer or the alphabet of the correct answer is written.
- In case of MCQ, 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 Q. No. 14 contain Twelve short answer type of questions carrying two marks each. (Attempt any Eight)
- Section C: Q. No. 15 to Q. No. 26 contain Twelve short answer type of questions carrying three marks each. (Attempt any Eight)
- Section D: Q. No. 27 to Q. No. 31 contain Five long answer type of questions carrying four marks each. (Attempt any Three)
- Begin the answer of each section on a new page.
If members of two populations have difference in the structure of reproductive organs, then this type of isolation is called ______.
ethological
seasonal
mechanical
habitat
Chapter:
The primary precursor of Indole-3-Acetic acid is ______.
Tryptophan
Phenyl alanine
Mevalonic acid
Methionine
Chapter:
If only one DNA molecule is subjected to PCR and the time required for each cycle is three minutes, then after five cycles, how many DNA molecules are obtained?
10
15
32
64
Chapter:
The specific gravity of CSF is ______.
1.005
1.02
1.502
1.81
Chapter:
Cardiac output of a person is 5400 ml and heart rate 72 per min. What will be his stroke volume?
65 ml
74 ml
75 ml
78 ml
Chapter:
Detritus food chain starts from ______.
producers
dead organic matter
parasite
photosynthesis
Chapter:
Plants absorb ______ water.
gravitational
capillary
combined
hygroscopic
Chapter:
The organisms have tolerance for wide range of salinity are called ______.
stenothermal
euryhaline
stenohaline
eurythermal
Chapter:
Hisardale is a new breed of sheep developed by crossing ______.
Bikaneri ram and Marion ewe
Bikaneri ram and Bikaneri ewe
Marino ram and Bikaneri ewe
Marino ewe and Marino ram
Chapter:
Perforins are secreted by ______.
Helper T-cells
Cytotoxic T-cells
Suppressor T-cells
Memory T-cells
Chapter:
Mention the chromosome number having the mutated gene for β-Thalassemia.
Chapter:
If the megaspore mother cell has 26 chromosomes, what will be the total number of chromosomes in endosperm of the same plant?
Chapter:
Give scientific reason:
The pyramid of energy is always upright.
Chapter: [0.14] Ecosystems and Energy Flow
What will be the base sequence on the template strand of DNA, which codes for methionine?
Chapter:
Deficiency of which element causes Brown heart disease in plants?
Chapter:
What are the cells of Rauber situated in the blastocyst of human embryo?
Chapter:
Give one example of the autosomal dominant traits.
Chapter:
Give one example of the autosomal recessive disorder.
Chapter: [0.03] Inheritance and Variation
If a carrier woman marries a colourblind man, what will be the phenotype of their progeny? Show in the form of a chart.
Chapter:
Sketch the appropriate diagram showing the deletion of chromosomal aberration.
Chapter:
Sketch the appropriate diagram showing the inversion of chromosomal aberration.
Chapter:
Observe the following diagram of double circulation and identify A, B, C and D:
Chapter:
Select the names of fresh-water fishes from the given list:
Sardinella
Rastrelliger
Cirrhina
Harpadon
Labeo
Chapter:
Give the economic importance of lac insect.
Chapter: [0.11] Enhancement of Food Production
Define ‘Ecological succession’.
Chapter: [0.14] Ecosystems and Energy Flow
Advertisements
Mention any two ill-effects of UV-rays on human beings.
Chapter:
Give advantages of oral vaccines.
Chapter: [0.12] Biotechnology
Give advantages of vernalization.
Chapter: [0.07] Plant Growth and Mineral Nutrition
List out the various causes for biodiversity losses.
Chapter:
State the Function of Relaxin.
Chapter: [0.09] Control and Co-ordination
Sketch and label the diagram of a stoma showing kidney-shaped guard cells.
Chapter:
Explain in brief the process of southern blotting in DNA fingerprinting.
Chapter:
Explain in brief the process of hybridization in DNA fingerprinting.
Chapter:
Give a definition of Palaeontology.
Chapter: [0.05] Origin and Evolution of Life
Write a note on the significance of Palaeontology.
Chapter: [0.05] Origin and Evolution of Life
What is meant by pollination?
Chapter: [0.01] Reproduction in Lower and Higher Plants
Differentiate between Anaemophily and Entomophily with reference to:
- pollinating agent
- stigma
- nectar
- fragrance
Chapter:
Distinguish between the following:
Hypotonic and Hypertonic solutions
Chapter: [0.06] Plant Water Relation
Mention the effect of exo-osmosis on shape of the cell.
Chapter:
Mention the effect of endo-osmosis on the shape of the cell.
Chapter:
Give one difference between symplast and apoplast pathway.
Chapter:
Mention the control measures to prevent ascariasis.
Chapter:
With appropriate terms, complete the following chart and rewrite it.
| Sr. No. | Name of the disease | Name of pathogen |
| (i) | ___?___ | Entamoeba histolytica |
| (ii) | Typhoid | ___?___ |
| (iii) | ___?___ | Wuchereria bancrofti |
| (iv) | ___?___ | Plasmodium species |
Chapter:
Advertisements
Match the disease resistant varieties given in Column - I with the crops in Column - II and rewrite:
| Column - I | Column - II | ||
| (i) | Himgiri | (a) | Chilli |
| (ii) | Pusa subhra | (b) | Wheat |
| (iii) | Pusa sadabahar | (c) | Cauliflower |
| (d) | Cotton |
Chapter:
Explain the qualitative aspect of the growth phenomenon.
Chapter:
Explain the quantitative aspect of the growth phenomenon.
Chapter:
If a red colored female cattle is crossed with a white male cattle, what will be the appearance of progeny in F2 generation? Show the genotypes with the help of a chart.
Chapter:
Write the function of Medulla obiongata.
Chapter: [0.09] Control and Co-ordination
Write anticodons for the following triplet codons:
AUG, GAG, CUA, CCU
Chapter:
Mention the position of the human heart:
Eustachian valve
Chapter:
Mention the position of the human heart:
Bicuspid valve
Chapter:
Differentiate between open and closed circulation with reference to:
- blood pressure
- exchange of material
Chapter:
Draw a graafian follicle and label antrum and secondary oocyte.
Chapter: [0.02] Reproduction in Lower and Higher Animals
Describe the structure of Graafian follicle.
Chapter: [0.02] Reproduction in Lower and Higher Animals
What is placenta?
Chapter: [0.02] Reproduction in Lower and Higher Animals
Give reason:
Placenta is considered as a temporary endocrine gland.
Chapter:
Describe in brief the structural and hormonal changes during ovarian cycle.
Chapter:
-
- Name the formed elements which are useful in blood coagulation.
- Give its normal number per cubic millimetre (mm3) in human blood.
- Comment on the shape and secretion of the above mentioned formed elements.
- Explain in brief the mechanism of blood coagulation.
Chapter:
Give full form of the cloning vectors BAC and YAC.
Chapter:
Write the appropriate palindrome for EcoRI and indicate by an arrow its recognition sequence.
Chapter:
Enlist the uses of gene therapy.
Chapter: [0.12] Biotechnology
Mention two strategies evolved to prevent self-pollination in flowers.
Chapter: [0.01] Reproduction in Lower and Higher Plants
Other Solutions
Submit Question Paper
Help us maintain new question papers on Shaalaa.com, so we can continue to help studentsonly jpg, png and pdf files
Maharashtra State Board previous year question papers 12th Standard Board Exam Biology with solutions 2022 - 2023
Previous year Question paper for Maharashtra State Board 12th Standard Board Exam Biology-2023 is solved by experts. Solved question papers gives you the chance to check yourself after your mock test.
By referring the question paper Solutions for Biology, you can scale your preparation level and work on your weak areas. It will also help the candidates in developing the time-management skills. Practice makes perfect, and there is no better way to practice than to attempt previous year question paper solutions of Maharashtra State Board 12th Standard Board Exam.
How Maharashtra State Board 12th Standard Board Exam Question Paper solutions Help Students ?
• Question paper solutions for Biology will helps students to prepare for exam.
• Question paper with answer will boost students confidence in exam time and also give you an idea About the important questions and topics to be prepared for the board exam.
• For finding solution of question papers no need to refer so multiple sources like textbook or guides.
