Plus Two Zoology Model Question Paper 3

Kerala Plus Two Zoology Model Question Paper 3

Time: 1 Hour
Cool off time: 10 Minutes
Maximum: 30 Score

Answer all the following questions. Each carries 1 score.

Question 1.

Addition or detection of chromosome gen­erally results in …………….

Question 2.
One among the contraceptive method is peculiar. Find the odd one. What is com­mon among others?
a. Periodic abstinence
b. Coitus interruptus
c. Lactational amenorrhea
d. lUD’s

Question 3.
Observe the diagram below:

Which among the following is the compli­mentary sequence of the DNA fragment shown above?

a. 5′ → ATTCG → 3’
b. 3′ 4 ATTCG → 5′
c. 3′ → TAAGC → 5′
d. 3′ → CGAAT → 5′

Answer any nine questions from 4 – 14. Each car­ries 2 scores.

Question 4.
The treatment facility advertised on the bro­chure of a private clinic is shown below.
IVF     ZIFT    GIFT   IUI

a. Can you suggest what type of a clinic it is?
b. Make a brief note on any three of the treatment procedures.

Question 5.
Analysing the relationship among different columns, fill the gaps appropriately.

Question 6.
The widespread incidence of diseases like H₁,N₁, Chikungunya, dengue fever etc., are reported recently. As a science student, prepare an action plan in your school to control those diseases.

Question 7.
A DNA sequence is provided below:
TACGAGTTATATATACAT
a. Write down the triplet codons it codes for.
b. If a nitrogen base is added in between 4^th and 5^th nitrogen bases, what will be its effect on transcription?

Question 8.
Arrange the following diseases in the fol­lowing columns in a meaningful order.
Typhoid, Ringworms, Amoebiasis, AIDS, Malaria, Pneumonia, Common cold.

Question 9.
Identify the traits from the pedigree chart. Give one example each.

Question 10.
Nature does a lot of services for which an economic value or price tag can be put”. Substantiate giving examples.

Question 11.
The flow of genetic information is shown below.

Name the processes a, b, c, and d.

Question 12.
0bserve the diagram and answer the questions:

a. Identify the process shown in the figure and define it.
b. Identify the structure B. Write any one function of it in the process shown in the diagram.

Question 13.
Prepare a pamphlet for an awareness programme in your school about the measures to prevent and control alcohol and drug abuse in adolescents.

Question 14.
” Gopalan argues that if the father is of ‘A’ blood group, the mother is of’B’ blood group. Their children can only be ‘A’ group, B group or ‘AB’ group.”
a. Do you agree with Gopalan’s argument?
b. Give a reason for your answer.

Answer any three from 15-18 questions. Each carries 3 scores.

Question 15.
“Nature provides all for the need of man but not for his greed.”
a. Do you agree with this statement? Justify your answer.
b. Distinguish between two types of biodiversity conservations.

Question 16.
We have a moral responsibility to take good care of earth’s biodiversity and pass it on in good order to the next generation.
a. Define biodiversity.
b. Write causes for biodiversity losses.
c. Name two types of biodiversity conser­vation.

Question 17.
a. Identify the syndrome from the diagram, and write the genotype.
b. It occurs in both sexes (male and female). Write the reason.

Question 18.
a. The steps in DNA fingerprinting are given below. Complete the flowchart (A& B).
b. Mention the applications of DNA fingerprinting.

Answers

Answer 1.
Aneuploidy

Answer 2.
d. lUD’s. Others are natural contraceptive methods and IUD is the barrier method.

Answer 3.
3’→ TAAGC→ 5′

Answer 4.
a. Infertility clinic.
b.
1. IVF (In Vitro Fertilisation): Fertilisation outside the body in almost similar condi­tions as that in the body.

2. ZIFT (Zygote IntraFallopian Transfer): After IVF, the zygote thus formed is al­lowed to develop in vitro until it reaches 8 celled stages. Then it is transferred into the fallopian tube. This technique is called ZIFT.

3. GIFT (Gamete Intra Fallopian Transfer): Transfer of an ovum collected from a donor into the fallopian tube of another female who cannot produce one, but can provide a suitable environment for fertilisation and further development is another method attempted.

4. IUI (Intra-Uterine Insemination): In this technique, the semen collected either from the husband or a healthy donor is artificially introduced either into the va­gina or into the uterus.

Answer 5.
a. Bacteria
b. Common Cold
c. Wuchereria bancrofti
d.  Helminth of Roundworm

Answer 6.
To control or eliminate the vectors and their breeding places. This can be achieved by avoiding stagnation of water in and around residential areas, regular cleaning of house­hold coolers, use of mosquito nets, intro­ducing fishes like Gambusia in ponds that feed on mosquito larvae, spraying of insec­ticides in ditches, drainage areas, and swamps, etc. In addition, doors and win­dows should be provided with wire mesh to prevent the entry of mosquitoes.

Answer 7.
a. AUG/CUC/AAU/AUA/UAU/GUA.
b. Frameshift mutation

Answer 8.
Bacterial diseases: Typhoid,pneumonia,
Viral diseases: Common cold, AIDS
Fungal diseases: Ringworm
Protozoan diseases: Amoebiasis, malaria.

Answer 9.
a. Autosomal dominant trait.
eg., myotonic dystrophy
b. Autosomal recessive trait,
eg., Sickle cell anemia

Answer 10.
Nature does a lot of service to mankind, eg., Amazone rain forest produce 20% of total oxygen.in the atmosphere. It make an organism live by helping each other, eg., pollination.
Nature provide aesthetic value and happi­ness to our mind, eg., walking through for­est or watching spring flowers in full bloom etc. give pleasure to our mind. So the ser­vice of nature is countless where we can­not give economic value.

Answer 11.
a. Replication
b. Transcription
c. Translation
d. Reverse transcription

Answer 12.
a. Protein synthesis.
b. B- Ribosome. It help the formation of a protein by sliding over amino acid.

Answer 13.
Some of the measures useful for preven­tion and control of alcohol and drugs abuse among adolescents are:

1. Avoid undue peer pressure
2. Education and counseling.
3. Seeking help from parents and peers.
4. Looking for danger signs.
5. Seeking professional and medical help, action.

Answer 14.
a. No.
b. A blood group means it exists as i iA or i^A
i^A, B blood group means it exists as i^Bi, i^B
i^B. So the child can have genotype.

So the child can have ‘O’ blood group also. Blood group system in human is a \ example for co-dominance.

Answer 15.
a.Yes. The accelerated rates of species ex­tinctions that the world is facing now are largely due to human activities,
b.
(1) In-situ conservation: On-site conser­vation, eg., national park, sanctuary, biosphere reserve, sacred-groves etc.
(2) Ex-situ conservation: Off-site conser­vation. eg., botanical garden, zoologi­cal park, safari park, seed bank.

Answer 16.
a. It refers to the totality of genes, species, and ecosystems of a region, The term biodiversity is popularized by Edward Wilson.
b.
(1) habitat loss and fragmentation
(2) overexploitation
(3) alien species invasions
(4) co-extinctions
c.
(1) In-situ conservation: On site conser­vation. eg., national park, sanctuary, biosphere reserve, sacred-groves etc.
(2) Ex-situ conservation: Off-site conser­vation. eg., botanical garden, zoological park, safari park, seed bank.

Answer 17.
a. Down’s syndrome.,
b. The disorder is due to the additional copy of chromosome number. 21, i.e., 21^st Trisomy.

Answer 18.
a.
A – Digestion of DNA by a restriction endonuclease.
B – Hybridisation using labeled VNTR probe.
b.
It is used as a forensic tool to solve the problems of paternity, rape, and mur­der etc.
It is used to determine population and genetic diversity.
Used in the diagnosis of genetic dis­eases.

Plus Two Zoology Previous Year Question Papers and Answers