General Science Class 8th MCQs=682

• The transfer of characteristics from parents to offspring is called heredity.
• Every living organism, (plants animals, and human being) has a set of characteristics inherited from its parents.
• Cell division can occur in two ways, mitosis and meiosis.

•   Mitosis is the process of cell division during which a parent cell divides into two genetically identical daughter cell.
• Mitosis occurs only in somatic cell.
• Daughter cell has complete set of chromosomes.
• The number of chromosome remains same.
• Meiosis is a type of cell division in which a parent cell is divides in to four daughter cell each having half           number of chromosomes.
• Meiosis occurs in germ cell.
• Daughter cells have half number of chromosomes.

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• The transfer of characteristics from parents to their offspring  is called heredity.

• The bases of heredity are the following material present in the nucleus.

• Chromosomes: A chromosome is the basis of heredity.

• Chromosomes made up of two types of molecules, DNA and protein.

• DNA (De Oxy Ribo Nucleic Acid): DNA is made up of units called nucleotides.

• Each nucleotide is composed of the following three components. 1) Deoxyribose sugar  
  2) Phosphoric acid        3) Nitrogenous base.

• The shape of DNA looks like twisted ladder which is called double helix shape.

• Genes: Genes are the basic units of heredity located on chromosomes.

• The genes of free ear lobes are dominant to attached ear lobes.

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Humans have ………. Pairs of chromosomes.
a) 25   
b) 40               
c) 23   
d) 12

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Living organisms have a set of characteristics that are transferred from………
a) Environment                       
b) School        
c) Parents                   
d) All of these

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Chromosomes are made up of …………..
NTS PST –P-2----18 L
a) DNA and protein   
b) DNA                       
c) Protein                    
d) Fats

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Eye color in human beings is controlled by…
a) Gens                                   
b) Nucleus      
c) Cytoplasm              
d) Meiosis

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Conversion of cell into two new daughter cells is called……………….
a) Cell growth             
b) Cell death   
c) Cell division                       
d) Cell inheritance

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