Biology 10th Class Guess Paper 2021 | Punjab Board

Here I am sharing the Punjab board’s new guess paper for class 10th Biology. You can download here important short questions and long questions have been given chapter-wise.

10th Class Biology (guess paper) Important Short Question

Unit 10

  • Difference b/w breathing & respiration
  • Lenticels & their function
  • Larynx & function
  • Voice box & vocal cords
  • How sound is produced in larynx?
  • Trachea, its length, role of C shaped rings in it
  • Alveoli & function
  • Pleural membranes & function
  • Inhalation & exhalation
  • Bronchitis & types
  • Emphysema
  • Asthma, symptoms & reasons
  • Nicotine & harmful effects
  • Stomata & lenticels

Unit 11

  • Homeostasis with examples
  • Osmoregulation & Thermoregulation
  • Excretion
  • Are guttation and dew synonyms?
  • Hydrophytes, Xerophytes & halophytes with examples
  • Skin & function
  • Organs of urinary system of man
  • Parts of nephron
  • Renal corpuscle & its parts
  • Lithotropsy
  • Renal tubule
  • Kidney failure & its causes
  • Kidney transplant

Unit 12

  • Coordination & types
  • Stimulus & examples
  • Receptors & effectors examples
  • Coordinators & examples
  • Effectors & examples
  • Response & example
  • Types of nerves
  • Hypothalamus & its function
  • Somatic nervous system
  • Parts of inner ear
  • Functions of oxytocin hormone
  • Nervous system
  • Reflex action & reflex arc
  • Endocrine system

Unit 13

  • Difference b/w exoskeleton & endoskeleton
  • Function of skeletal system
  • Cartilage & its structure
  • Types of cartilage with definitions
  • Bone & its function
  • Compact bone
  • Difference b/w cartilage & bone
  • Appendicular skeleton
  • Types of joints & examples
  • Difference b/w hinge and ball and socket joints
  • Tendon & its function
  • Origin & insertion
  • Antagonism
  • Osteoporosis
  • Rheumatoid arthritis its symtoms & causes
  • Gout & its causes & symptoms

Unit 14

  • Sexual & asexual reproduction
  • Parthenogenesis with example
  • Bulbs & examples
  • Disadvantages of vegetative propagation
  • Cloning & tissue culture
  • Alternation of generation in plants
  • Pollination & its types
  • Double fertilization
  • Epigeal & hypogeal germination with examples
  • Conditions necessary for seed germination
  • Internal & external fertilization
  • Oogenesis
  • Causes of spread of AIDS

Unit 15

  • Nitrogenous bases present in DNA double helix
  • Genotype & phenotype
  • Monohybrid cross
  • Mendel’s law of segregation
  • Di-hybrid cross
  • Mendal’s law od independent assortment
  • Co-dominance & example
  • Sources of variations
  • Difference b/w continuous & discontinuous variation
  • Difference b/w artificial & natural selection
  • Difference b/w breeds & varities
  • Main sources of variations in sexually reproducing population

Unit 16

  • Food chain & Food web with examples
  • Ecological pyramid
  • Nitrogen fixation
  • Nitrification & de-nitrification
  • Assimilation
  • Predation & example
  • Difference b/w ecto-parasites & endo- parasites
  • Mutualism & Commensalism with example
  • Global warming
  • Acid rain & how it is formed?

Unit 17

  • Biotechnology
  • Genetic engineering & its objectives
  • Types of fermentation
  • Fermentation with reference to biotechnology
  • Alcoholic fermentation & its importance
  • Lactic acid fermentation
  • Names of organism involved in fermentation & uses
  • Fermenter & its advantages
  • Continuous fermentation
  • Four achievements of genetic engineering
  • Single cell protein

Unit 18

  • Pharmacology
  • Medicinal & addictive drugs
  • Synthetic drugs & examples
  • Analgesics & examples
  • Antibiotics & examples
  • What drugs are obtained from animals?
  • Narcotics & examples and uses
  • Antibiotics
  • Difference b/w bactericidal & bacteriostatic antibiotics
  • Vaccines
  • Hallucinogens
  • Social stigma
  • Vaccines
  • Work of JosephLister Problems of drug addiction

10th Class Biology (guess paper) Important Long Question

  • Define osmoregulations. Describe the role of kidney in osmoregulations.
  • Describe the structure & function of human brain.
  • Explain reflex action & reflex arc with diagram.
  • Describe the structure of human eye.
  • What is thyroid gland? Name its hormones & describe their functions.
  • What is neuron or nerve cells. Describe its structure.
  • Write a note on structure & function of human brain.
  • Define joint. Describe different types of joints.
  • Explain antagonism in muscle action selecting biceps & triceps as examples.
  • Define arthritis. Write its symptoms & treatment. Also describe its types.
  • What do you know about cartilage? Describe its types. What is meant by binary fission.
  • How asexual reproduction takes place in bacteria, amoeba and planaria.
  • What is meant by vegetative propagation.
  • Describe different ways of natural vegetative propagation.
  • Describe two most common methods of artificial propagation.
  • Describe the processes of spermatogenesis & oogenosis.
  • Describe the male & female reproductive system of rabbit.
  • What conditions are necessary for the germination of seeds?
  • Write a note on Aids.
  • Describe the Watson-Crick model of DNA.
  • State & explain Mendel’s law of segregation.
  • Write a note on artificial selection.
  • Discuss the biotic components of an ecosystem.
  • Write a note on nitrogen cycle & carbon cycle.
  • Write a note on symbiosis.
  • Write down the scope & importance of biotechnology.
  • Write down the application of fermentation.
  • Write down the achievements of genetic engineering.
  • What basic steps a genetic engineer adopts during the manipulations of genes.
  • Describe different sources of drugs.
  • Write a note on resistance against antibiotics.
  • Describe the mode of action of vaccines.
  • Drug addiction & associated problems.

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