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Biology : Plant & Animal Cells III (Parts & Functions)


Given the PLANT / ANIMAL
CELL PART, identify the DESCRIPTION

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1.

Lysosome

  It performs intracellular digestion. It also helps in destroying foreign substances.

  It contains chromatin fibres, which are made up of DNA (Deoxyribonucleic acid). After cell division takes place, these chromatin fibres undergo certain structural changes, and are called chromosomes. These chromosomes carry the hereditary information of the genes.

  It provides support to the cell. It also helps in the synthesis and transport of proteins and fats.

  It is a plastid, containing pigments such as xanthophyll (yellow in color) and carotene (orangish-red in color). These pigments impart color to flowers and fruits of plants.

  Half-n-half Clue
 

2.

Nucleolus

  It synthesizes proteins by producing and storing RNA (Ribonucleic acid). At the same time, it orders ribosomes to synthesize proteins.

  It is the house of all metabolic activities and functions in the cell. In other words, it contains most of the cell organelles, each of which perform a specific function.

  It initiates and regulates cell division. It also helps in forming spindle fibres, with the help of asters.

  It helps in the storage of water and several other substances, namely food, waste products and pigments. It also provides turgidity to the cell.

  Half-n-half Clue
 

3.

Mitochondrion

  It contains chromatin fibres, which are made up of DNA (Deoxyribonucleic acid). After cell division takes place, these chromatin fibres undergo certain structural changes, and are called chromosomes. These chromosomes carry the hereditary information of the genes.

  It is the site of ATP (Adenosine triphosphate) synthesis. It also synthesizes respiratory enzymes.

  It is semi-permeable, allowing substances to enter and leave the nucleus of the cell. It also provides protection to the nucleus of the cell.

  It provides support to the cell. It also helps in the synthesis and transport of proteins and fats.

  Half-n-half Clue
 

4.

Cell Membrane

  It provides protection, shape and rigidity to the cell. It is freely permeable, allowing substances in the form of solutions to enter and leave the cell without any hindrance.

  It controls and coordinates all the activities and functions of the cell. It plays a vital role in cell division.

  It provides shape to the cell. It is semi-permeable, regulating the entry and exit of substances, namely solutes and ions.

  It synthesizes and secretes certain substances, namely hormones and enzymes. It also helps in the formation of acrosome of sperm.

 
Hint      

5.

Nuclear Membrane

  It provides support to the cell. It also helps in the synthesis and transport of proteins and fats.

  It is a plastid, containing pigments such as xanthophyll (yellow in color) and carotene (orangish-red in color). These pigments impart color to flowers and fruits of plants.

  It is semi-permeable, allowing substances to enter and leave the nucleus of the cell. It also provides protection to the nucleus of the cell.

  It provides shape to the cell. It is semi-permeable, regulating the entry and exit of substances, namely solutes and ions.

  Half-n-half Clue
 

6.

Nucleoplasm

  It synthesizes and secretes certain substances, namely hormones and enzymes. It also helps in the formation of acrosome of sperm.

  It contains chromatin fibres, which are made up of DNA (Deoxyribonucleic acid). After cell division takes place, these chromatin fibres undergo certain structural changes, and are called chromosomes. These chromosomes carry the hereditary information of the genes.

  It performs intracellular digestion. It also helps in destroying foreign substances.

  It is a plastid. It helps in the storage of starch.

  Half-n-half Clue
 

7.

Nucleus

  It is known as the 'site of protein synthesis in the cell', and synthesizes proteins. It is chiefly composed of RNA (Ribonucleic acid).

  It performs intracellular digestion. It also helps in destroying foreign substances.

  It provides shape to the cell. It is semi-permeable, regulating the entry and exit of substances, namely solutes and ions.

  It controls and coordinates all the activities and functions of the cell. It plays a vital role in cell division.

 
Hint      


 
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