Give the full form of-
2. What is a dikaryon?
3. Name to essential amino acids.
4. Who proposed the cell theory? State the cell theory.
5. Give the significance of zygotene stage of meiosis.
Section – B
6. Name the kingdom to which these organism belong:
a) Bacteria
b) Puccinia graminis
c) Euglena
d) Diatoms
7. Differentiate between the following:
a) Peptide bond and Glycosidic bond
b) Polypeptide and polynucleotide
8. Draw the fluid Mosaic model of cell membrane.
9. What is erythroblastosis foetalis?
10. Draw a labelled diagram of human heart.




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1)     a…..International Code of Botanical Nomenclature

          b….International Code of Zoological Nomenclature

2)    The dikaryon is a nuclear feature which is unique to some fungi. A hypha occurring in certain fungi after sexual reproduction in which each compartment contains two nuclei, one fromeach parent.

3)     Any two of these……

histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.

4)    Cell theory was proposed by 3 scientists

a.     Theodor Schwann

b.     Matthias Jakob Schleiden

c.      Rudolf Virchow.

Cell theory is a scientific theory which describes the properties of cells

5)     To retain normal number of chromosomes after fertilization.


·       Eubacteria or Monera

·       Fungi

·       Protista

·       Eukaryota


7)     Answers…..

a)…in the pic given below...


- is a biological polymer (a molecule that consists of many repeating units) comprised of covalently-bound nucleotides. For example, DNA and RNA. 

- is a single, linear chain of amino acids bound to one another by peptide/amide bonds. For example, mature proteins (such as myoglobin) are polypeptides

9)   The condition in which mother’s white blood cells attack the baby’s red blood cells as they would any foreign invaders.

Hope it is helpfull......