HSC Science (General)
Academic Year: 2012-2013
Date: October 2012
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Work out a typical Mendelian dihybrid cross and state the law that he derived from it.
Chapter:
What is Bacteriophage?
Chapter: [0.04] Molecular Basis of Inheritance
Sketch and label lytic cycle.
Chapter: [0.04] Molecular Basis of Inheritance
Which one of the following is an example of multiple alleles?
(a) Height in pea plant
(b) Hair colour in cattle
(c) Petal colour in four o'clock plant
(d) Wing-size in Drosophila
Chapter: [0.03] Inheritance and Variation
The harmful radiations absorbed by the ozone layer are ______.
X-rays
visible light
Ultraviolet (UV) rays
gamma rays
Chapter: [0.15] Biodiversity, Conservation and Environmental Issues
The micro-organism used in the production of acetic acid is ______.
Aspergillus niger
Rhizopus arrhizus
Neurospora gossypii
Acetobacter aceti
Chapter: [0.11] Enhancement of Food Production
The adenosine triphosphate (ATP) gain during glycolysis, connecting
link and Krebs' cycle respectively are ___
(a) 8, 6, 24
(b) 8, 24, 6
(c) 24, 8, 6
(d) 6, 8 24
Chapter:
Guano deposits are rich in ______.
sulphur
phosphorus
calcium
magnesium
Chapter: [0.14] Ecosystems and Energy Flow
How many meiotic divisions are required for the formation of 100 seeds?
25
50
100
125
Chapter: [0.01] Reproduction in Lower and Higher Plants
During fertilisation male gamete are carried by pollen tube. This is called ______.
syngamy
siphonogamy
mesogamy
polygamy
Chapter: [0.01] Reproduction in Lower and Higher Plants
Define 'microsporogenesis'.
Chapter: [0.01] Reproduction in Lower and Higher Plants
Define 'Greenhouse effect'.
Chapter: [0.15] Biodiversity, Conservation and Environmental Issues
Name any two edible mushrooms.
Chapter: [0.11] Enhancement of Food Production
Name the reactions when a-ketoglutarate is converted to succinyl Co-A in Krebs' cycle
Chapter:
What is amphimixis?
Chapter: [0.02] Reproduction in Lower and Higher Animals
What is a heterocyst?
Chapter: [0.11] Enhancement of Food Production
Sketch and label the ‘Ultrastructure of Mitochondrion’.
Chapter:
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Give advantages of single cell protein (SCP).
Chapter: [0.11] Enhancement of Food Production
Explain the concept of primary productivity.
Chapter: [0.13] Organisms and Populations [0.14] Ecosystems and Energy Flow
With the help of suitable diagram define 'bagging' and 'tagging' of flower.
Chapter: [0.11] Enhancement of Food Production
Give advantages of self-pollination.
Chapter: [0.01] Reproduction in Lower and Higher Plants
A heterozygous tall plant of pea is crossed with a dwarf plant of pea.
Calculate the phenotypic ratio of the progeny.
Chapter: [0.03] Inheritance and Variation
Distinguish between photosynthesis and aerobic respiration.
Chapter: [0.08] Respiration and Circulation
What is photorespiration?
Chapter: [0.07] Plant Growth and Mineral Nutrition
Give its diagrammatic representation of photorespiration?
Chapter:
Sketch and label V. S. of mature anatropous ovule.
Chapter: [0.01] Reproduction in Lower and Higher Plants
Explain the process of formation of urine with suitable diagram
Chapter: [10.02] Excretion and Osmoregulation
Add a noteon composition of urine.
Chapter: [10.02] Excretion and Osmoregulation
Describe the changes involved during gastrulation.
Chapter: [0.02] Reproduction in Lower and Higher Animals
The phenomenon of industrial melanism demonstrates__________
(a) natural selection
(b) induced mutations
(c) reproductive isolation
(d) geographical isolation
Chapter: [0.05] Origin and Evolution of Life
a·1 antitrypsin is used in the treatment of _______________.
Phenylketonuria
Cystic fibrosis
Emphysema
Haemophilia
Chapter: [0.1] Human Health and Diseases
Charas, hashish, ganja are obtained from __________.
Papaver somniferous
Erythroxylum coca
Atropa belladonna
Cannabis sativa
Chapter: [0.1] Human Health and Diseases
The catecholamines are secreted by _________.
adrenal cortex
adrenal medulla
thymus
pancreas
Chapter: [0.09] Control and Co-ordination
Which of the following are 'scavenger cells'?
(a) Lymphocytes
(b) Erythrocytes
(c) Basophils
(d) Macrophages
Chapter: [0.08] Respiration and Circulation
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The pairing of homologous chromosomes is call______
(a) crossing over
(b) terminalization
(c) synapsis
(d) bivalent
Chapter: [0.04] Molecular Basis of Inheritance
Hot spot method of in situ conservation protects ___________ species in its own habitat.
vulnerable
rare
indeterminate
endangered
Chapter: [0.15] Biodiversity, Conservation and Environmental Issues
Name the radioactive probe used in India for DNA fingerprinting.
Chapter: [0.04] Molecular Basis of Inheritance
Name the viral diseases in poultry animals
Chapter: [0.11] Enhancement of Food Production
What is vaccine?
Chapter: [0.1] Human Health and Diseases
Name the disorder caused by under secretion of thyroxine in children
Chapter: [0.03] Inheritance and Variation
Why only left ovary and oviduct arc present in birds?
Chapter: [0.05] Origin and Evolution of Life
Give the graphical representation of Hardy· Weinberg's principle in the form of Punnet Square.
Chapter: [0.05] Origin and Evolution of Life
Explain the technique of multiple ovulation embryo transfer (MOET) in animal breeding.
Chapter: [0.11] Enhancement of Food Production
Illustrate any ‘three’ genes which can be used in gene therapy.
Chapter: [0.12] Biotechnology
Describe the structure of blastula.
Chapter: [0.02] Reproduction in Lower and Higher Animals
Give the importance of fossil in support of organic evolution
Chapter: [0.05] Origin and Evolution of Life
Describe the antigen-antibody complex
Chapter: [0.1] Human Health and Diseases
Distinguish between ape and man.
Chapter: [0.05] Origin and Evolution of Life
Give the effects of water pollution on human health
Chapter:
Draw labelled diagrams of the following: Eye
Chapter: [0.09] Control and Co-ordination
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