Reviewing solved Biology Question Paper Class 10 Kerala Syllabus Set 5 English Medium helps in understanding answer patterns.
Biology Class 10 Kerala Syllabus Model Question Paper Set 5
Time: 1½ Hours
Score: 40 Marks
Instructions:
- First 15 minutes is given as cool off time.
- This time is to be used for reading and understanding the questions.
- Answer the questions based on instructions.
- Answer the questions according to the score and time.
I Answer any five questions from Q. No. 1 to 6. Each carries one score.
Question 1.
Main stages in the history of human evolution is given as pair. Choose and write the correct pair.
a. Homo sapiens – First fossils were discovered from France.
b. Homo habilis – First fossils were discovered from Asia.
Answer:
a. Homo sapiens – First fossils were discovered from France.
Question 2.
Identify the word pair relation and fill the blanks.
a. B Lymphocyte – Bone marrow
b. T Lymphocyte – …………………
Answer:
b. T Lymphocyte – Thymus gland
Question 3.
Who is the proponents of chemical evolution theory?
a. Stanley Miller – Urey
b. Darwin – de Vries
c. Oparin Haldane
Answer:
c. Oparin – Haldane
Question 4.
Choose the correct statement from the following and write it.
AIDS is spreads:
a. By using the same toilet.
b. Through insects like mosquitoes, houseflies etc.
c. From HIV infected mother to the foetus.
d. By taking bath in the same pond.
Answer:
c. From HIV infected mother to the foetus.
Question 5.
Which among the following disease is spreads through air?
a. Nipah
b. Rat fever
c. Tuberculosis
d. Hepatitis
Answer:
c. Tuberculosis
Question 6.
Identify the diagram and write the activity of this.
Answer:
Neutrophil – Engulfs and destroy germs.
II. Answer any six questions from Q. No. 7 to 13. Each carries two score.
Question 7.
What are the contrasting traits which Mendel choose his first hybridization experiment? What is the character of off springs formed in the first generation?
Answer:
Tall Dwarf, The character Tall is formed only in the first generation.
Question 8.
Which are the white blood cells that specifically identify and destroying pathogens? From where does it mature?
Answer:
B Lymphocyte, T Lymphocyte.
B Lymphocyte – in the thymus gland and T lymphocyte in the bone marrow.
Question 9.
Which are the two bacterial diseases found in animals?
Answer:
Anthrax, Inflammation of udder.
Question 10.
Identify the odd one and write the common features of the others.
Eye spot, Rod cells, Jacobson’s organ, Lateral line
Answer:
Rod cells, others are the receptors in various organisms.
Question 11.
Prepare a poster specifying the importance of eye donation.
Answer:
The poster preparing appropriately.
Eg:
| May others have the luck to see this beautiful world … Eye donation sacred gift |
Question 12.
Complete the blanks.
Oxytocin – Facilitates child birth by stimulating the contraction of smooth muscles in the uterine wall.
(a)
(b) – Helps in the reabsorption of water in the kidney.
Answer:
a. Facilitates lactation
b. Vasopressin or ADH
Question 13.
How Diphtheria spreads?
Answer:
Diphtheria spreads through cough, sneezing or directly from the infected person to another person.
III. Answer any five questions from Q. No. 14 to 20. Each carries three score.
Question 14.
Complete the table.
| Number of strands | Type of sugar | Nitrogen bases | |
| (a) | 2 | (c) | (e) |
| RNA | (b) | (d) | (f) |
Answer:
a. DNA
b. 1
c. Deoxyribose
d. Ribose
e. Adenine, Thymine, Cytosine, Guanine (ATCG)
f. Adenine, Uracil, Cytosine, Guanine (ATUG)
Question 15.
What are the evidences to support the evolution?
Answer:
a. Fossil studies
b. Comparative Morphological studies
c. Physiology
d. Molecular Biology
Question 16.
How can be identify the real culprit from among the suspected persons through DNA profiling?
Answer:
DNA of the skin, hair, nail, blood and other body fluids obtained from the place of murder, robbery etc. is compared with the DNA of suspected persons. Thus the real culprit can be identified from among the suspected persons.
Question 17.
Identify the diagram and write the function.
Answer:
Ear ossicles in the middle ear, amplify and transmit the vibrations of the tympanum to the internal ear.
Question 18.
Complete the illustration.
Answer:
B. What are the major symptoms of diabetes?
Answer:
A. a. Increases
b. Decreases
c. Increases
d. Decreases
B. Increased appetite and thirst and frequent urination.
Question 19.
Define the stages, Gigantism, Dwarfism and Acromegaly.
Answer:
Gigantism – If the production of somatotropin increases during the growth phase, it leads to the excessive growth of the body. This condition is called Gigantism.
Dwarfism – Stage which the production of somatotropin decreases during the growth phase.
Acromegaly Condition caused by the excessive production of somatotropin after the growth phase, characterised by the growth of the bones on the face, jaws and fingers.
Question 20.
‘Haemophilia has also proper treatment as other diseases have’. This is Rahul’s opinion.
Do you agree to this? What is Haemophilia? What can do for the relief of this disease?
Answer:
Do not agree with this opinion. Haemophilia is the condition in which excess blood is lost even through minor wounds. As haemophilia is a genetic disease, a complete cure is not possible at present. Temporary relief is brought in by identifying and injecting the deficient protein.
IV. Answer any two questions from Q. No. 21 to 23. Each carries four score.
Question 21.
Redraw the given diagram and label on the basis of indicators.
a. The part which secretes neurotransmitter.
b. Longest filament from the cell body.
c. The part which carries impulses to the synaptic knob.
Answer:
Question 22.
Illustrate an evolutionary tree on the basis of indicators given.
Indicators
• Anthropoidea • Cercopithecoidea • Hominoidea
• Monkey • Man • Gibbon • Chimpanzee • Orangutan • Gorilla
Answer:
Question 23.
What is meant by the crossing over in chromosomes? How this process causing the expression of new characters in offsprings?
Answer:
During the initial phase of meiosis, chromosomes pair and exchange their parts. This process is called crossing over of chromosomes.
• As a result of this, part of a DNA crosses over to become the part of another DNA. This causes a difference in the distribution of genes.
• When these chromosomes are transferred to the next generation, it causes the expression of new characters in offsprings.