BIOLOGY PUC II year Important questions for 2019-20 [Prepared by subject experts]

BIOLOGY PUC II year Important questions for 2019-20

[Prepared by subject experts]

As per Karnataka PU Board [NCERT]

Special thanks to Kiran M Benagi M.Sc, B.Ed, K-SET.

PRARTHANA 

P. U. SCIENCE COLLEGE, BAGALKOT

REPRODUCTION IN ORGANISMS

marks
1. Define parthenogenesis.
2. Define embryogenesis.
3. Mention the asexual reproductive structures of penicillium.
4. What are hermaphrodites?
5. Mention the asexual reproductive structure in sponges.
6. What are vegetative propagules? Give two examples

2marks
1. Distinguish between homogametic and heterogametes
2. What are hermaphrodites? Give examples.
3. Differentiated between menstrual cycle and oestrous cycle.
4. Differentiate seasonal breeders from continuous breeders.
5. Differentiated between menstrual cycle and oestrous cycle.

3marks
1. a] what are hermaphrodites? Mention one example.
b] Offspring of asexual reproduction are called clones. Why?
2. Mention the units of vegetative propagation in plants.
3. Name asexual reproductive structures in
i] Hydra ii] Chlamydomonas iii] Penicillium
4. What is heterothallic condition? Differentiate between stamina and pistillate flowers.
5. What is parthenogenesis? Give two examples.
6. a] Differentiate between external fertilization and internal fertilization.
b] Name the plant which produces flowers once in 12 years.
Chapter 2
1 marks
1. Papaya plants exhibit xenogamy only. Why?
2. What is emasculation?
3. Differentiate between Geitonogamy and Xenogamy.
4. What is apomixes?

3marks
1. Briefly explain the structure of pollen grains
2. Draw a next labelled diagram of longitudinal section of typical flower.
3. How is pollination achieved in Vallisneria and sea grasses?
4. What are cleistogamous flowers? Write their significance.
5. What is artificial hybridisation? By which technique is it achieved?
6. What is pollination? Mention any four features of wind pollinated flowers
7. Explain pollination in Zoostera and vallisneria

5marks
1. Describe the outbreeding devices that prevent autogamy.
2. What is double fertilization? Describe fertilized embryo sac with a labelled diagram.
3. Explain the transverse section of young anther with a labelled diagram.
4. Write the events of development of female gametophyte in correct order.
5. Explain the structure of a mega sporangium(OVULE).
6. Draw neat labelled diagram of Mature embryosac

Sexual reproduction in flowering plants

marks
1. Papaya plants exhibit xenogamy only. Why?
2. What is emasculation?
3. Differentiate between Geitonogamy and Xenogamy.
4. What is apomixes?

3marks
1. Briefly explain the structure of pollen grains
2. Draw a next labelled diagram of longitudinal section of typical flower.
3. How is pollination achieved in Vallisneria and sea grasses?
4. What are cleistogamous flowers? Write their significance.
5. What is artificial hybridisation? By which technique is it achieved?
6. What is pollination? Mention any four features of wind pollinated flowers
7. Explain pollination in Zoostera and vallisneria

5marks
1. Describe the outbreeding devices that prevent autogamy.
2. What is double fertilization? Describe fertilized embryo sac with a labelled diagram.
3. Explain the transverse section of young anther with a labelled diagram.
4. Write the events of development of female gametophyte in correct order.
5. Explain the structure of a mega sporangium(OVULE).
6. Draw neat labelled diagram of Mature embryosac

Human reproduction

1 marks
1. Name the cells that secrete the androgens.
2. What is menopause?
3. Name the physical physiological connection between maternal body and embryo (foetus)
4. .Why is oxytocin necessary for parturition?
5. What is menarche?
6. Ovulation takes place on the 14th day of the menstrual cycle. Why?
7. What is colostrum?
8. Mention the function of the sertoli cells of a testis.
9. Name the hormone secreted by corpus luteum.
10.What is ovulation?

2marks
1. List any four hormones secreted by placenta.
2. Placenta is the structural and functional unit between foetus and natural body
Substantiate the statement.
3. Mention the accessory ducts of male reproductive system.

5marks
1. Draw a neat and labelled diagram of human sperm.
2. What is spermatogenesis? Explain the process of spermatogenesis.
3. Draw a neat labelled diagram of section view of human female reproductive system.
4. Draw a neat labelled diagram of human male reproduction system.

Respective Health

2marks
1. Mention any two natural methods of birth control.
2. List any two simple principles to prevent sexually transmitted diseases.

3marks
1. Suggest ant three assisted reproductive technologies to overcome infertility.
2. How do the following assisted reproductive technologies assist the couple to have
children: a] Invitro fertilization b] Zygote intra fallopian transfer
c] Gamete intra fallopian transfer
3. What is infertility? Give reasons for infertility in humans.

5marks
1. a] What is Medical Termination of Pregnancy? Mention the safe period for medical
Termination of pregnancy.
b] Write three simple principles to prevent sexually transmitted diseases.
2. a] List three reasons for population explosion.
b] Name male and female sterilization procedures.
3. What is infertility? How is it treated by assisted reproductive technologies like GIFT

Principles of inheritance and variation

2marks
1. What is test cross? Mention its significance.
2. Mention two symptoms of Turner’s syndrome.
3. What are the conclusions drawn by .M. Morgan from the crossing experiments in Drosophila
with respect to linkage?
4. Mention the possible genotypes of A and B blood group individuals.
5. The shape of RBC’s of sickle cell anaemia patients changes to elongated sickle like structure.
6. Why did Thomas hunt morgan select fruit flies for his genetically experiments?
7. Write four symptoms of Down’s syndrome.
8. What is incomplete dominance? Give an example.
9. What are Mendelian disorders? Give two examples.

3marks
1. Mention the causes and effects of phenylketonuria.
2. What is male heterogamete? Explain sex determination in humans.
3. What is aneuploidy? Write any four symptoms of Down’s syndrome.
4. Write the karyotype of the following
 i] Down’s syndrome ii] Klinefelter’s syndrome iii] Turner’s syndrome
5. Write the homozygous genotype of A, B, and O blood groups
6. Briefly explain sex determination in human being.

5marks
1. Write the schematic representation of dihybrid cross and mention the result.
2. State the law of independent assortment. Write schematic representation of dihybrid
cross.
3. With reference to flower colour in snapdragon, explain incomplete dominance
4. a] What are multiple alleles? Give an example.
b] Write the symptoms of klinefeleter’s syndrome.

Chapter 6 Molecular basis of inheritance
1 marks
1. Lactose is termed as inducer in lac operon. Give reason.
2. Define transcription.
3. What is euchromatin?
4. Why DNA replication is called semiconservative?

2marks
1. tRNA is an adaptor molecule. Comment.
2. Codon AUG has dual function. Justify.
3. What are the criteria of DNA to act as a genetic material?

3marks
1. RNA polymerases in eukaryotes show division of labour. Substantiate.
2. Mention any three application of DNA finger printing technique.

5marks
1. Mention the steps involved in DNA fingerprinting
2. List the salient features of human genome project
3. Describe Lac operon concept with labelled sketch.
4. Summarize major events DNA finger printing technique.
5. Describe the process of DNA replication with the help of a diagram
6. Describe Frederick Griffith’s experiment to show transformation in bacteria.
7. Describe the process of translation of mRNA.

8. Enumerate the salient features of the human genome project (HGP)
9. Enumerate ant five salient features of genetic code.

Chapter 7 :

Evolution

1 marks
1. What is gene pool?
2. What is adaptive radiation?
3. Give an example of adaptive radiation.
4. What is saltation?
5. Name the theory which attempts to explain “Origin of universe’.
6. Define genetic drift.
7. What is a homologous structure? Give an example.

2marks
1. What are homologous organs? Mention any two examples.
2. What are analogous organs? Give example.
3. What is adaptive Radiation? Give an example
4. Write any two factor affecting Hardy – Weinberg principle.

3marks
1. List the period, brain capacity and probable food of Homo erectus stage of human
Evolution
2. Draw a next labelled diagram or diagrammatic representation of Miller’s experiment.
3. Name the six stages of human evolution in correct sequence.
4. State the Hardy – Weinberg principle. Mention any two factors that affect the Hardy –
Weinberg equilibrium.
5. What are analogous organs? Give any two examples.

5marks
1. Give the diagrammatic representation if Miller’s experiment

Chapter 8:
Human health & Disease
1 marks
1. What is allergy?
2. Mention the cells involved in cell-mediated immunity.
3. What is benign tumour?
4. Name a causative organism of pneumonia.
5. Name the plant from which cocaine is obtained.
6. Name the disease diagnosed by the widal test
7. What are interferon’s?
8. Name the diagnostic test for AIDS.
9. Name the causative agent of elephantiasis.
10.From which plant Morphine is extracted?
11.Name the causative agent of elephantiasis

2marks
1. Differentiate between active immunity and passive immunity
2. Draw a neat labelled diagram of an antibody.
3. Distinguish between Benign tumour and Malignant tumour.
4. Draw a neat labelled diagram of an antibody molecule.
5. List any methods of HIV transmission.

3marks
1. Mention any three prevention and control measures of drug/alcohol abuse.
2. List any three types of innate immunity barriers and give an example for each
3. What is contact inhibition? Mention the types of tumours.
4. Mention any three characteristics of a cancer cell.
5. Name the pathogen, vector, and symptoms of malaria.
6. Mention the types of carcinogens with an example for each.

Strategies for enhancement of food production

1 mark
1. Plant cells are totipotent. Why?
2. What is totipotency?
3. What are somaclones?
4. Name one microbe used in the production of single-cell protein.
5. Name a new breed of sheep developed in Punjab by cross breeding technique.

2marks
1. Write a note on selection and testing of superior recombinants in plant breeding
2. Mention ant two measures to improve the quality and quantity production.
3. Write a note on single cell protein.
4. What is inbreeding depression? How is it controlled?
5. What is cross-breeding? Name a new breed developed by crossing bikaneri ewes and merino
rams
6. Define Apiculture. List any two economic importance of it.

3marks
1. a] Single cell proteins can be used as an alternate source of porteins for human nutrition.
Illustrate with two examples.
b] How can tissue culture are applied to recover healthy plants from virus- infected plants?
2. Write the meaning of following terms:
a] Explant b] Totipotency c] Somaclones

5marks
1. a] Discuss the MOTE technique of animal breeding.
 b] Differentiate between inbreeding and outbreeding.
2. a] What is poultry? Mention two important components of poultry farm management.
b] Define inter- specific hybridization. Give an example
3. a] Write the steps involved in multiple ovulation and embryo transfer.
 b] Differentiate between out crossing and cross breeding.
4. a] Explain the out breeding processes employed to improve desirable qualities of animals.
 b] Write any two processes dealt with to increases the yield and quality of milk in diary farm
management
1 marks
1. Mention the bacterium responsible for large holes in ‘Swiss cheese’.
2. What are bio fertilizers?
3. Mention the use of cyclosporine A.
4. Name the fungus that produces cyclosporine A.
5. Name the enzyme by which the HIV genome replicated in a host cell.
6. Mention the use of statin
7. Which bioactive molecule is used as an immune suppressive agent?
8. Define biochemical oxygen demand.
9. Name the microbe used in the production of citric acid.
10.What are flocs?

Microbes in human welfare

2marks
1. Discuss the role of fungi as Bio fertilizers.
2. Draw a neat labelled diagram of biogas plant

5marks
1. Briefly discuss the role of biological control of pests and diseases.
2. Explain different stages involved in sewage treatment.
3. Describe the parts of a biogas plant with a labelled diagram.
4. Explain the role of microbes in industrial products


LIST OF IMPORTANT DIAGRAMS
 T S of Anther
 V S of ovule
 Matured embryosac
 Fertilized embryosac
 Male reproductive system
 Sperm
 Female reproductive system
 Millers experiment
 Harshey and chase experiment
 Nucleosome
 Replication fork
 Transcription unit
 Lac operon
 Life cycle of plasmodium
 Life cycle of HIV
 Structure of antibody
 Biogas plant
 R dna technology
 pBR322 plasmid
 Energy flow
 Detritus food chain
 Carbon cycle
 Phosphorous cycle
 Electrostatic precipitator
 Scrubber
 Stirred tank bio reactor
 Sparged tank bio reactor
LIST OF IMPORTANT CHAPTERS FOR 10/10( 1M)
 Chapter 3 - Human reproduction
 Chapter 6- Molecular basis of inheritance
 Chapter 7 - Evolution
 Chapter 8 – Human health and disese
 Chapter 9 – Stratagies for enhancement of food production
 Chapter 10 – microbes in human welfare
 Chapter 11 – Biotechnology principles and process
 Chapter 13 – organisms and population
 Chapter 16- environmental issues