Year 10 General Science
Homework 1: What is inside a nucleus?
Due on: _________________________
Name: _____________________________
Science Group: __________
DoubleHelix in
DNA (Deoxyribonucleic Acid) shape
1. List the 4 basic structures (organelles) you can find in both plant and animal cells.
________________________, ____________________________, ________________________, _____________________
2. Match the structure for the following function:
Structure
Description
Function
Jelly content inside the cell Where chemical reactions take
place
Spherical in shape
Control centre of the cell
Sausage shape
Produce energy from respiration
A thin layer surrounding
To control substance in or out
cytoplasm
3. The above cell is an animal cell. Give 2 reasons why it is an animal cell instead of a plant cell.
(Hint: 3 extra structures in plants)
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4. What is the shape of the chromosome? Where can you find the chromosomes inside a cell?
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5. Which chemical is found inside a chromosome? What is the shape of this chemical?
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6. What is a gene?
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7. The following shows the Karyotype of Human.
a. How many chromosomes does a human
cell have?
_________________________
b. Why do chromosomes appear in PAIRS?
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c. What will be the Human Female Karyotype
look like?
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d. What is Karyotype?
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8. The following shows the fruit flies used in many Genetics Experiment and Studies. They are
called Drosophila – only 2-3 mm in length.
http://www.wikihow.com/Distinguish-Between-Male-and-Female-Fruit-Flies
a. Give 2 differences in the appearance of the female and male Drosophila?
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b. How many chromosomes does a Drosophila have? ____________ or ____________ pairs.
c. What is the difference between the sex chromosomes between female and male flies?
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