HSC Science (General)
Academic Year: 2017-2018
Date: जुलै 2018
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In an octamer of the nucleosome, core DNA consists of ______ base pairs.
46
146
246
346
Chapter: [0.04] Molecular Basis of Inheritance
Select and write the most appropriate answer from the given alternatives for the following subquestion:
A versatile anther is an adaptation for _______ type of pollination.
anemophilous
entomophilous
hydrophilous
ornithophilous
Chapter: [0.01] Reproduction in Lower and Higher Plants
_______ is an example of a GM crop developed for its nutritional value by using the soil bacterium Erwinia.
IR8
Taichung Native - I
Vijaya
Golden rice
Chapter: [0.12] Biotechnology
The energy enters the ecosystem through ______.
consumers
decomposers
omnivores
producers
Chapter: [0.14] Ecosystems and Energy Flow
Identify free-living bacterial bio-fertilizer.
Rhizobium
Azotobacter
Nostoc
Bacillus thuringiensis
Chapter: [0.11] Enhancement of Food Production
Select and write the most appropriate answer from the given alternatives for the folowing subquestion:
_______ is a soil bacterium which causes crown gall tumours in dicotyledonous plants.
Agrobacterium tumefaciens
Bacillus thuringiensis
Haemophilus influenzae
Escherichia coli
Chapter:
Which of the following harmful radiation is absorbed by the ozone layer of the stratosphere?
X-ray
Visible light
Ultraviolet rays
Gamma rays
Chapter: [0.15] Biodiversity, Conservation and Environmental Issues
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Answer the following question in ‘One’ sentence only:
Define ‘mutation breeding’.
Chapter: [0.05] Origin and Evolution of Life
Answer the following question in ‘One’ sentence only:
Enlist the histones which form an octamer of nucleosome.
Chapter: [0.04] Molecular Basis of Inheritance
Answer the question in ‘One’ sentence only:
Name ‘any one’ therapeutic product of blood proteins made by using rDNA technology.
Chapter: [0.12] Biotechnology
Name the strain of yeast used in the industrial production of wine.
Chapter: [0.01] Reproduction in Lower and Higher Plants
Answer each question in ‘One’ sentence only:
Identify which one of the following is a test cross.
Tt × Tt
TT × tt
Tt × tt
Chapter: [0.05] Origin and Evolution of Life
Answer each question in ‘One’ sentence only:
Define stock and scion.
Chapter: [0.11] Enhancement of Food Production
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Attempt any TWO of the following:
‘The gene for sickle cell anaemia in homozygous condition is lethal and produces sickle cell trait in heterozygous carrier’. Explain.
Chapter: [0.03] Inheritance and Variation
Attempt any TWO of the following:
Enlist the applications of tissue culture.
Chapter: [0.11] Enhancement of Food Production
Attempt any TWO of the following:
Describe ‘any two’ factors affecting the rate of photosynthesis.
Chapter:
Attempt any TWO of the following:
Define the terms ‘codon’ and ‘anticodon’.
Chapter: [0.04] Molecular Basis of Inheritance
Explain in brief the biogas production process with the help of a labelled figure.
Chapter: [0.11] Enhancement of Food Production
Attempt any TWO of the following:
Define ‘deforestation’. Comment on its effects
Chapter: [0.15] Biodiversity, Conservation and Environmental Issues
Attempt any TWO of the following:
With the help of a suitable example illustrate ‘Palindrome’.
Chapter: [0.04] Molecular Basis of Inheritance
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