HSC Science (General)
Academic Year: 2016-2017
Date: July 2017
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_______ enzymes are used as biological scissors in r-DNA technology.
(A) Restriction endonucleases
(B) DNA ligases
(C) DNA polymerases
(D) Reverse transcriptases
Chapter: [0.04] Molecular Basis of Inheritance
Vijaya, Padma, Kanti and Jayanti are high-yielding varieties of ______.
wheat
jowar
sugarcane
rice
Chapter: [0.11] Enhancement of Food Production
Mitochondria are regarded as semiautonomous organelles, due to the presence of ______.
Cristae
RNA
DNA
F1 particles
Chapter: [0.08] Respiration and Circulation
Ozone depletion is occurring widely in the stratosphere; it leads to an ozone hole caused mainly due to ______.
ethylene
methane
CFCs
CO2
Chapter: [0.15] Biodiversity, Conservation and Environmental Issues
The partially decomposed organic matter is formed by a process called ______.
fragmentation
humification
mineralisation
leaching
Chapter: [0.14] Ecosystems and Energy Flow
The number of adenine molecules in a given DNA segment is 25 and the number of cytosine molecules is 45, the total number of nucleotides in the segment is _______________.
70
140
90
50
Chapter: [0.04] Molecular Basis of Inheritance
The microbial source of vinegar is ______.
Aspergillus niger
Rhizopus arrhizus
Acetobacter Aceti
Streptomyces venezuelae
Chapter: [0.11] Enhancement of Food Production
What is a heterocyst?
Chapter: [0.11] Enhancement of Food Production
Why Chl-a (Chlorophyll-a) is Called Essential Pigment?
Chapter: [0.07] Plant Growth and Mineral Nutrition
Define global warming.
Chapter: [0.15] Biodiversity, Conservation and Environmental Issues
Give the meaning of the Nif gene.
Chapter: [0.11] Enhancement of Food Production
Name the aquatic fern commonly used in paddy fields as a biofertilizer.
Chapter: [0.11] Enhancement of Food Production
Sketch and label the ultrastructure of chloroplast.
Chapter:
Enlist the advantages of Biogas.
Chapter: [0.11] Enhancement of Food Production
Give the names of ‘two’ insect-resistant crop varieties.
Chapter: [0.11] Enhancement of Food Production
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Enlist the causes of deforestation.
Chapter: [0.15] Biodiversity, Conservation and Environmental Issues
Give the floral adaptations of entomophily.
Chapter: [0.01] Reproduction in Lower and Higher Plants
Explain 'Wobble hypothesis' with the help of a suitable diagram.
Chapter: [0.04] Molecular Basis of Inheritance
Describe the connecting link between glycolysis and Krebs’ cycle.
Chapter:
Sketch and label lytic cycle.
Chapter: [0.04] Molecular Basis of Inheritance
What is Neo-Mendelian genetics?
Chapter: [0.03] Inheritance and Variation
Describe quantitative inheritance controlled by two pairs of genes.
Chapter: [0.03] Inheritance and Variation
Enlist advantages and disadvantages of cross pollination
Chapter: [0.01] Reproduction in Lower and Higher Plants
Add a note on pollination mechanism in Salvia.
Chapter: [0.01] Reproduction in Lower and Higher Plants
Overproduction is the principle of
(A) Lamarckism
(B) Theory of organic evolution
(C) Panspermia theory
(D) Modern theory of evolution
Chapter: [0.05] Origin and Evolution of Life
Myopia is an example of ______.
Complete sex-linkage
Incomplete sex-linkage
Recombination
Crossing over
Chapter: [0.09] Control and Co-ordination
__________ is the infectious stage of Plasmodium.
Tropozoite
Tropozoite
Sporozoite
Sporozoite
Cryptozoite
Cryptozoite
Metacercaria
Metacercaria
Chapter: [0.1] Human Health and Diseases
Which of the following is a chemical transmitter in the synapse of neurons?
cholesterol
cholesterol
A.T.P.
A.T.P.
cholinesterase
cholinesterase
acetylcholine
acetylcholine
Chapter: [0.09] Control and Co-ordination
The external layer of connective tissue sheath of human testis is __________.
Tunica vasculosa
Tunica vaginalis
Tunica granulosa
Tunica albuginea
Chapter: [0.02] Reproduction in Lower and Higher Animals
Glucose is taken back from glomerular filtrate ___________
(A) along with concentration gradient
(B) against concentration gradient
(C) by simple diffusion
(D) by tubular secretion
Chapter: [10.02] Excretion and Osmoregulation
Pituitary dwarfism is treated with gene therapy by____
(A) Human insulin
(B) Tissue growth factor - Beta
(C) Tissue plasmogen activator
(D) Human growth hormone producer gene
Chapter: [0.02] Reproduction in Lower and Higher Animals
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Mention the first vaccine developed against any human disease.
Chapter: [0.1] Human Health and Diseases
Name the ‘two’ types of maps generated by H.G.P.
Chapter: [0.03] Inheritance and Variation
What is ‘syndrome’?
Chapter: [0.03] Inheritance and Variation
Name the type of T-lymphocyte which secretes perforins.
Chapter: [0.08] Respiration and Circulation
What is the full form of IVF?
Chapter: [0.02] Reproduction in Lower and Higher Animals
What is protobiogenesis?
Chapter: [0.05] Origin and Evolution of Life
Sketch and label the structure of Malpighian body.
Chapter: [10.02] Excretion and Osmoregulation
Give reason – ‘Archaeopteryx is called connecting link between reptiles and birds’.
Chapter: [0.11] Enhancement of Food Production
Summarise the process of vaccine production
Chapter: [0.1] Human Health and Diseases
Write a short note on ‘lac culture’.
Chapter: [0.11] Enhancement of Food Production
Define the following term:
Commensalism
Chapter: [0.13] Organisms and Populations
Explain the types of chromosomes on the basis of position of centromere.
Chapter: [0.03] Inheritance and Variation
Give the symptoms of typhoid fever and draw a labelled diagram of its causal organism.
Chapter: [0.1] Human Health and Diseases
With the help of suitable diagrams, explain how the age structures determine the trend of population.
Chapter: [0.13] Organisms and Populations
Describe the T. S. of thyroid gland
Chapter: [0.09] Control and Co-ordination
Describe the T.S. of human testis
Chapter: [0.02] Reproduction in Lower and Higher Animals
Briefly describe the process of spermatogenesis.
Chapter: [0.02] Reproduction in Lower and Higher Animals
With the help of a suitable diagram, describe the conducting system of the human heart.
Chapter: [0.08] Respiration and Circulation
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