MoSys SB015 semester 1 sesi 2019/2020
NAME: ………………………………………
PRACTICUM: …………………………
This question paper consists of 4 questions. Answer ALL questions in the space provided
in this question paper.
Mark
1. FIGURE 1 below shows a polymer of a carbohydrate.
1
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/6
2
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/11
3
-
/9
4
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/14
TOTAL-
/40
FIGURE 1
a. Identify the molecule shown in FIGURE 1.
[1 mark]
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b. Draw the monomer of the molecule in (a).
[1 mark]
c. Name the bond that links the two monomers in (b).
[1 mark]
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d. Give ONE function of molecule shown in FIGURE 1.
[1 mark]
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e. Give TWO characteristics of this class of carbohydrate shown in FIGURE 1.
[2 marks]
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2. (a)
FIGURE 2 shows types of epithelial tissues.
Cell X
Tissue B
Tissue A
FIGURE 2
(i) Identify tissue A and tissue B
[2 marks]
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MoSys SB015 semester 1 sesi 2019/2020
(ii) Name cell X and explain how its function at respiratory tract.
[2 marks]
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(iii) State the location of tissue B.
[1 mark]
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(b)
FIGURE 3 shows a plant cell immersed in a sucrose solution. The pressure potential (Ψp) and the
solute potential (Ψs) of the cell and of the sucrose solution are shown below.
Ψ p = 240 kPa
Ψ s (cell) = -550 kPa
Plant cell
Ψ s (cell) = -750 kPa
Ψ s sucrose solution = -1200 kPa
FIGURE 3
(i) Define osmosis in term of water potential.
[2 marks]
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(ii) Calculate the water potential of the cell.
[2 marks]
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(iii) Explain the movement of water in figure above.
[2 marks]
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3. FIGURE 4 shows the stage of Prophase I in meiosis.
Structure A
Site B
FIGURE 4
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MoSys SB015 semester 1 sesi 2019/2020
a. Name structure A and site B in FIGURE 4.
[2 marks]
Structure A: ________________________
Site B: _________________________
b. State the behavior of chromosome shown in FIGURE 4.
[1 mark]
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c. What is the significance of the process in (b)?
[1 mark]
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d. State ONE characteristic of structure A.
[1 mark]
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e. Explain how meiosis produces haploid daughter cells.
[1 mark]
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f.
Mitosis produces genetically identical daughter cells. Explain ONE process that ensure this genetic
stability.
[2 marks]
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g. Based on structures in FIGURE 4 determine ONE difference of cell division in animal and plant
cell.
[1 mark]
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4. (a) In a population of garden pea, there are two types of seeds produced. The allele for yellow seeds
(Y) is dominant to that for green seeds (y). Two plants with yellow seeds but unknown genotype were
crossed. The results were as follow:
Yellow seeds
Green seeds
i.
444
156
Which Mendel’s law explains the combination of alleles in the above cross?
[1 mark]
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ii.
Determine the type of cross between the two plants.
[1 mark]
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MoSys SB015 semester 1 sesi 2019/2020
iii.
Draw a genetic diagram to show the above cross.
[3 marks]
iv.
What is the genotypic ratio of the F1 generation?
[1 mark]
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(b) The color and texture of hair in domestic dog breeds are determined by two pairs of alleles. One of the
pairs of alleles in both characteristics is not completely expressed. When a male with a phenotype of fawn
straight hair is breed to female with black curly hair, all the offspring produced were having agouti wavy
hair.
i.
State the type of inheritance described above.
[1 mark]
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ii.
If the male produces gametes of AyK+ and the female gamete produced is aKC. Determine their
genotype.
[1 mark]
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iii.
Draw a genetic diagram to show this marriage until F1 generation
[3 marks]
iv.
Using Punnett square, show the cross when an F1 male breed with agouti curly hair female.
[2 marks]
v.
Determine the frequency of offspring produced is having wavy hair.
[1 mark]
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