ques = new Array()
cor = new Array()

ans = new Array()
ans[1] = new Array()
ans[2] = new Array()
ans[3] = new Array()
ans[4] = new Array()
ans[5] = new Array()
ans[6] = new Array()
ans[7] = new Array()
ans[8] = new Array()


fb = new Array()
fb[1] = new Array()
fb[2] = new Array()
fb[3] = new Array()
fb[4] = new Array()
fb[5] = new Array()
fb[6] = new Array()
fb[7] = new Array()
fb[8] = new Array()


  

  

ques[1] = "Choose the statement which best describes mitosis."
cor[1] =2
ans[1][1]="Cells copy and duplicate to make new sex cells."
ans[1][2]="Cells copy themselves for growth and repair."
ans[1][3]="Cells copy and make new cells that are genetically different."
fb[1][1]="Sorry, that's not right. Meiosis makes sex cells."
fb[1][2]="That's right. Cells for growth and repair are provided by mitosis."
fb[1][3]="Not quite right here. Cells made by mitosis are all genetically identical. It is meiosis that gives genetically different cells."

ques[2] = "Select the option which has a correct base pair for DNA."
cor[2] =3
ans[2][1]="Adenine pairs with Adenine."
ans[2][2]="Thymine pairs with Guanine."
ans[2][3]="Guanine pairs with Cytosine."
fb[2][1]="Sorry. Adenine pairs with Thymine."
fb[2][2]="No, Thymine pairs with Adenine."
fb[2][3]="Yes, that's right. Guanine is always paired with Cytosine."


ques[3] = "What is a gene?"
cor[3] =1
ans[3][1]="A gene is a section of DNA that codes for a particular part of the cell such as an enzyme or structural protein."
ans[3][2]="A gene is another name for a chromosome."
ans[3][3]="A gene is roughly half of a chromosome."
fb[3][1]="That's right. Genes hold the code for a single protein, such as an enzyme. They ultimately control the features of the whole person."
fb[3][2]="No, that's not right. A chromosome is a length of DNA but it contains many thousands of genes."
fb[3][3]="Sorry that's not right. Half of a chromosome would contains many different genes."


ques[4] = "Which statement best describes the heart?"
cor[4] =3
ans[4][1]="The heart is a specialised tissue."
ans[4][2]="The heart is the circulatory system."
ans[4][3]="The heart is an organ that is part of the circulatory system."
fb[4][1]="Bad luck. The heart contains different types of tissues. e.g. heart muscle and valve tissues."
fb[4][2]="Sorry but that's wrong. The circulatory system contains the heart and the blood vessels (arteries, veins and capillaries)."
fb[4][3]="Excellent. The heart is an important organ in the circulatory system"


ques[5] = "What is a mutation?"
cor[5] =1
ans[5][1]="A change in the cell's DNA."
ans[5][2]="A change in the cell's cytoplasm."
ans[5][3]="A change in the cell surface membrane."
fb[5][1]="That's right. Mutations are permanent changes in the cell's DNA. Some can trigger cancers."
fb[5][2]="Bad luck. Mutations are permanent changes in the cell's DNA. Some can trigger cancers."
fb[5][3]="No, that's not right. Mutations are permanent changes in the cell's DNA. Some can trigger cancers."

ques[6] = "How does smoking cause lung cancer?"
cor[6] =2
ans[6][1]="Heat from the cigarette damages lung cells."
ans[6][2]="Chemicals in the cigarette causes mutations in lung cells."
ans[6][3]="Carbon monoxide in the cigarette smoke reduces oxygen in the lungs."
fb[6][1]="Sorry, the heat would not trigger cancer."
fb[6][2]="Yes, that's correct. Hydrocarbons in the cigarette smoke increase the chance of DNA mutations."
fb[6][3]="No, that's wrong. The carbon monoxide reduces the oxygen levels of the blood but does not cause cancer."

ques[7] = "What is the function of the cell cytoplasm?"
cor[7] =3
ans[7][1]="It regulates what gets in and out of the cell."
ans[7][2]="It controls the activities of the cell."
ans[7][3]="It is where chemical reactions, like anaerobic respiration, take place."
fb[7][1]="Sorry, it is the cell membrane controls what gets in and out of the cell."
fb[7][2]="That's not right. It is the nucleus that controls the cell's activities."
fb[7][3]="That's right. The cell's chemical reactions happen in the cytoplasm."

ques[8] = "Which of these structures is the smallest?"
cor[8] =2
ans[8][1]="Tissue"
ans[8][2]="Nucleus"
ans[8][3]="Cell"
fb[8][1]="Sorry but that's not correct. Tissues are made from groups of cells."
fb[8][2]="Well done. A nucleus is part of a cell."
fb[8][3]="That's not right. Cells are small but they contain a nucleus, which is even smaller."