F5 Sc p2

8/16/2019 F5 Sc p2

1/8

SULIT 2 1511/2

Section A

(20 marks)

Answer all questions in this section

1 A farmer conducted an experiment to study the growth of a hen in 4 weeks. The mass of

the hen is measured every week. The results of the experiment are shown in table 1.

Time / Week Mass of hen/ kg

0 0.1

1 0.5

1.5

! .

4 .4

Table 1

"a# $ased on table 1% the mass of the hen increases the most from week to

week &1 marks'

"b# (sing the data in table 1% plot a graph of the mass of the hen against time on the

graph provided. & marks'

)ass* kg

Time*

week

1511/2 © 2015 Hak Cipta Asia Pacific Smart School SULIT

8/16/2019 F5 Sc p2

2/8

SULIT 3 1511/2

2 +igure 1 shows the endocrine system of a man.

+igure 1

"a# ,ame the gland marked -.

&1 marks'

"b# tate the hormone secreted by -

&1 marks'

"c# /hat condition would result from over secretion of hormones from -

&1 marks'

"d# f the man suffers from diabetes mellitus% which gland in his body is

malfunctioning

&1 marks'

"e# ,ame the hormones secreted by the gland named in "d# and explain its function


8/16/2019 F5 Sc p2

3/8

SULIT 4 1511/2

& marks'

"f# /hich endocrine gland is found in a female but not in a male

&1 marks'

3 +igure shows the inheritance of ear type in humans.

+igure

"a# tate the types of gametes produced by both parents.

& marks'

"b# 2ive the genotypic and phenotypic ratios of the +1 generation.

& marks'

"c# tate the law% which governs the inheritance shown in figure .

&1 marks'

4 3olour blindness is a disorder in which caused by the mutant gene. The gene for colour

blindness is recessive "a# while the gene for normal gene is dominant "A#. A person who is

heteroygous "Aa# is said to be a carrier of the defective gene.

"a# /hat is the genotype of colour blindness

&1 marks'

"b# f two carriers get married% what is the probability that their child will be an

colour blindness raw a schematic diagram to show how you arrive at the answer.


8/16/2019 F5 Sc p2

4/8

SULIT 5 1511/2

&4 marks'

Section B

30 !ar"s#

Answer all questions in this section

5 +igure 5 shows the structure of a cell from the nervous system.

y

+igure 5

"a# /hat type of neurone is represented by figure 5

&1 marks'

"b# ,ame the parts labeled x and y.

& marks'

"c# )ark with an arrow the flow of impulse on figure 5 &1 marks'

"d# n a reflex arc% which type of neurone are the impulses from the cell shown in

figure 5 transmitted to

&1 marks'

$ A cyclist was knocked down by a car and become unconscious. /hen he woke up in the

hospital% he found that he could not move his legs and feel any sensation. The doctor told

him that he was paralysed from the waist downward


x

8/16/2019 F5 Sc p2

5/8

SULIT $ 1511/2

"a# uggest two reasons why the cyclist was paralysed.

& marks'

"b# /hat had probably caused the loss of sensation in his legs

&1 marks'

"c# ,ame the parts that make up the peripheral nervous system.

& marks'

% Albinism is a disorder in which the body fails to produce melanin. The gene for albinism is

recessive "a# while the gene for normal melanin production is dominant "A#. A person who

is heteroygous "Aa# is said to be a carrier of the defective gene.

"a# /hat is the genotype of an albino

&1 marks'

"b# f two carriers get married% what is the probablibity that their child will be an

albino raw a schematic diagram to show how you arrive at the answer.

&4 marks'

"d# f a carrier marries an albino% what would be the expected phenotype ratio of their

offspring

&1 marks'

& 3loning% tissue culture and genetic engineering are various genetic researches carried out


8/16/2019 F5 Sc p2

6/8

SULIT % 1511/2

by scientists to help the human population.

"a# /hat is the advantage of cloning and tissue culture

&1 marks'

"b# ,ame an example of an animal that can be produced b y cloning.

&1 marks'

"c# +rom which part of a parental plant can tissue culture be carried out

&1 marks'

"d# 6ow is the offspring produced by tissue culture disadvantaged

&1 marks'

"e# ,ame one contribution each of genetic engineering to humans in the fields of

medicine and agriculture.

&1 marks'

"f# /hich microorganism is widely used in genetic engineering

&1 marks'

' +igure a and b show the formation of twins.


5 b5 a

8/16/2019 F5 Sc p2

7/8

SULIT & 1511/2

"a# /hat type twins are produced in figures 5"a# and 5"b#

& marks'

"b# tate the factors that can affect the growth of twins produced in +igure a

& marks'

"c# ,ame two characteristics that are different in twins produced in +igure 5"a# and

5"b#

& marks'

"d# 6ow many female gametes are involved in the formation of twins in +igure b

& marks'

Section

(20 marks)

Answer uestion 10 an* either uestion 11 or uestion 12

10

"a# 7xplain the above statement by naming the glands and hormones involved and

their functions in maintain the blood sugar &8 marks'

"b# tate two functional similarities and two functional differences between nervous

coordination and hormonal coordination. &4 marks'

11

"a# /hat is a 9gene: and how are they linked to chromosomes & marks'


The sgar le!el in the hman bo"# is controlle" b# hormones

8/16/2019 F5 Sc p2

8/8

SULIT ' 1511/2

"b# tate the importance of meiosis. &4 marks'

"c# ,ame four differences between meiosis and meiosis . &4 marks'

12 "a# /hat is mutation ,ame the types of mutation and for each type give an exampleof the disease it causes. &4 marks'

"b# )ary noticed that her classmates show differences in height and some are able to

roll their tongues while others cannot. /hat type of variations is shown by )ary:s

classmate

tate the differences between these types of variations &8 marks'

+,- . U+STI., A+

reare* hec"e* Aro6e*

7777777777777777 77777777777777777 777777777777777

(8r9 ,aren*rn) (8r9 Leon: hee ei ) (8r9 ohai;i asta!)

Su -eart!ent


F5 Sc p2

Documents

Transcript of F5 Sc p2