Download CB3 - 20 Questions ANSWERS

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1.
What is another name for a fertilised egg? Zygote
11. Give 2 differences between mitosis and meiosis? Mitosis produces
2 diploid genetically identical cells. Meiosis produces 4
haploid genetically different cells.
3.
12. What are the complimentary base pairs in DNA?
How many daughter cells are produced in meiosis? 4
What is a genome? All of your DNA in one cell.
4.
What is a gene? A section of DNA that codes for a protein.
5.
Name 1 haploid cell and 1 diploid cell in the body?
HOT QUESTIONS
2.
Adenine pairs with Thymine
Cytosine pairs with Guanine
13. How are bases held together in a molecule of DNA?
Using weak hydrogen bonds. Adenine and Thymine have 2
hydrogen bonds and cytosine and guanine have 3.
14. What is the backbone of DNA made up of? Sugar and phosphate
molecules.
15.One section of DNA contains the bases
Write the letters for
complimentary bases
underneath the letters.
Haploid = sperm or egg
Diploid = Body cell or fertilised egg (zygote)
AATGCGACTG ?
TTACGCTGAC
What is meiosis needed for? Making gametes
16.Everyone has different genes because we all have different orders of
what in the gene? Different orders of bases
7.
What are proteins made up of and why are they called polymers? Proteins are
17.If a cell is 2n what does this mean? Diploid – 2 sets of
made up of amino acids. Called polymers because they are very long
molecules.
8. What are chromosomes made of and how many are in a human body cell? Made of
DNA and 46 in human body cell.
9.
What shape is DNA? Double helix
10. Where can your genome be found? In the nucleus of one of your cells.
SIZZLING QUESTIONS
6.
chromosomes
18.If a cell is 1n what does this mean?
Haploid – one set of
chromosomes
19. What do you think a person with the disease “triploid syndrome” has
in their cells? Three sets of chromosomes
20. When a sperm fuses with an egg this process is called…?
Fertilisation