Biotechnology — BIOLOGY STD 12 Science — Question

Distinguish between : Neutrophils and Eosionophils.

Read the following and answer any four questions from (i) to (v) given below:
Many adaptations are found in flowers to achieve certain kind of pollination. The pollination achieved by insects is known as entomophily. The given diagram shows the cross-section of an anther of an insect pollinated flower.

1. Which of the following is/ are the function(s) of structure Y?

1. To carry waste products away from the anther.
2. To supply oxygen to the cells of the anther.
3. To transport food and mineral salts to the anther.
4. To supply water to the anther.

1. Conly.
2. C and D only.
3. A, B and D only.
4. A, B, C and D.

2. Which of the following most accurately describes the structures found in compartment X?

1. They contain two haploid nuclei resulting from meiosis.
2. They contain two haploid nuclei resulting from mitosis.
3. They contain two haploid male gametes, resulting from mitosis.
4. They contain a vegetative nucleus and pollen tube nucleus.

3. Which of the following is a distinctive characteristic of insect-pollinated flower?

1. All of them have nectar guides on their flowers.
2. They produce sugary fruit.
3. Their pollen grains tend to have rough surfaces.
4. They produce abundant quantities of pollen to make up for pollen grains that might be removed by the wind.

4. Which of the following are likely characteristics of the structures found in X and stamens of this plant?

S. No	Structure of X	Stamens
(a)	Abundant and light	Pendulous
(b)	Rough surfaces	Non-pendulous
(c)	Light and sticky	Pendulous
(d)	Coarse and sticky	Protrude outside the flower

5. Spiny or sticky pollen grains and large, attractively coloured flowers are associated with:

1. Hydrophily.
2. Entomophily.
3. Ornithophily.
4. Anemophily.

Diffusion and Osmosis.

Read the following and answer any four questions from (i) to (v) given below:
Turner's syndrome is an example of monosomy. It is formed by the union of an allosome free egg and a normal 'X' containing sperm or a normal egg and an allosome free sperm. 'The individual has 2n = 45 chromosomes (44 + X0) instead of 46. Such individuals are sterile females who have rudimentary ovaries, under developed breasts, small uterus, short stature, webbed neck and abnormal intelligence. 'They may not menstruate or ovulate. This disorder can be treated by giving female sex hormone to the women from the age of puberty to make them develop breasts and have menstruation. This makes them feel more normal.

1. Number of barr body present in a female with Turner's syndrome is?

1. 0
2. 1
3. 2
4. < 2.

2. Turner's syndrome is an example of?

1. Aneuploidy.
2. Euploidy.
3. Polyploidy.
4. Autosomal abnormality.

3. Turner's syndrome is a/an.

1. Autosomal recessive Mendelian disorder.
2. Autosomal dominant Mendelian disorder
3. Sex linked Mendelian disorder.
4. Chromosomal disorder.

4. Which of the following statements regarding Turner's syndrome is incorrect?

1. It is a case of monosomy of chromosomes.
2. The suffering individual is a sterile female, having one 'X' chromosome missing in the cells.
3. The problem is due to an extra chromosome.
4. The individual are of short stature.

5. Assertion: Turner's syndrome is caused due to absence of any one of the X and Y sex chromosome.

Reason: Individuals suffering from Turner's syndrome show masculine as well as feminine development

1. Both assertion and reason are true and reason is the correct explanation of assertion.
2. Both assertion and reason are true but reason is not the correct explanation of assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.

Distinguish between : Atria and Ventricles.

Read the following and answer any four questions from (i) to (v) given below:
Each testicular globule of testis contains one to three highly coiled seminiferous tubules. Wall of each seminiferous tubule is formed of single layered germinal epithelium. Majority of cells in this epithelium are cuboidal, called male germ cells. Study the transverse section of part of seminiferous tubule and answer the following questions.

1. What is the characteristic of K?

1. K is spermatogonium which grows into primary spermatocyte.
2. K is Sertoli cell which provides nutrition to spermatids.
3. K is secondary spermatocyte which undergo meiosis II to form spermatid.
4. K is spermatid being converted into sperm.

2. Which of the following cell undergo reduction division to form secondary spermatocyte?

1. J
2. M
3. L
4. K

3. How many among the following have 46 chromosomes?

1. 2
2. 4
3. 5
4. 3

4. Select an option that correctly identifies different labels.

1. L- Primary spermatocyte, N - Spermatozoa, M - Secondary spermatocyte.
2. J - Spermatogonium, K - Sertoli cell, O - Spermatozoa.
3. L- Primary spermatocyte, M - Secondary spermatocyte, N - Spermatozoa.
4. J - Spermatogonium, K - Primary spermatocyte, N - Spermatid.

5. Which hormone initiates spermatogenesis at puberty?

1. FSH
2. ICSH
3. ABP
4. GnRH

Read the following and answer any four questions from (i) to (v) given below:
A woman unable to conceive after many years of regular unprotected coitus went to specialised infertility clinic. On complete examination, woman was found to be normal, while male partner was diagnosed with infertility. Male partner is unable to copulate the female. Couple was advised to opt for assisted reproductive technology (ART).

1. Which ART could have been useful for this couple?

1. ZIFT
2. IUT
3. AI
4. GIFT

2. In which of the following infertility issues could this technique be used?

1. Anovulation.
2. Oligospermia.
3. Low fructose content in seminal fluid.
4. All of these.

3. Which among the following techniques is useful to conceive when there is very low sperm count?

1. GIFT
2. Test-tube baby
3. IUT
4. JCSI

4. Assertion: Artificial insemination (AI) is intra-uterine insemination.

Reason: In Al, sperms collected from donor are introduced into the uterus.

1. Both assertion and reason are true, and reason is the correct explanation of assertion.
2. Both assertion and reason are true, but reason is not the correct explanation of assertion.
3. Assertion is true, but reason is false.
4. Both assertion and reason are false

5. Success rate of artificial insemination technique is:

1. 20-40%
2. 60-70%
3. 40-50%
4. 5-7%

Distinguish between : Inspiratory Reserve Volume (IRV) and Expiratory Reserve Volume (ERV).

Read the following and answer any four questions from (i) to (v) given below:
X and Y are communicable diseases, whereas Wand Z are non-communicable diseases.X is transmitted through vectors whereas Y is transmitted through droplet infection. Wis caused due to a hormone deficiency, whereas Z is a degenerative disease. Based on the above information, answer the following questions.

1. Identify W, X, Y and Z.

	W	X	Y	Z
(a)	Coronary artery disease	Cholera	Chikungunya	Chikungunya
(b)	Diabetes	Malaria	Rhinitis	Alzheimer's disease
(c)	Alzheimer's disease	AIDS	Shigella	Plague
(d)	Gonorrhea	Diphtheria	Pertussis	Anthrax

2. Select the correct statement.

1. If X is sleeping sickness then its vector is Leishrnania.
2. If Y is diphtheria then it is caused by Bacillus anthracis.
3. If W is hypothyroidism then it is caused by deficiency of thyroxine hormone.
4. If Z is myocardial infarction then patient develops acute rheumatic fever, joint pain and throat infection.

3. If X and Y both are usual diseases then which of the following holds true?

1. X could be dengue caused by flavivirus and Y could be AIDS caused by HIV.
2. X could be chikungunya whereas Y could be rhinitis.
3. X could be hepatitis whereas Y could be rabies.
4. X could be chicken pox caused by Va rice/la zoster virus whereas Y could be yellow fever caused by flavivirus

4. If X and Y both are bacterial diseases then select the correct match from the following.

1. X- Bubonic plague-Yersinia pestis
2. Y-Leprosy- Mycobacteriurn leprae
3. X-Whooping cough-Bordetella pertussis
4. Y-Botulism-Clostridiurn botulinum

5. Assertion: Communicable diseases could be contagious or non-contagious.

Reason: Diseases that spread through vectors are non-contagious disease.

1. Both assertion and reason are true, and reason is the correct explanation of assertion.
2. Both assertion and reason are true, but reason is not the correct explanation of assertion.
3. Assertion is true, but reason is false.
4. Both assertion and reason are false.

Read the following and answer any four questions from (i) to (v) given below:
Saurin, a M.Sc student, get an assignment on sewage treatment plant (STP) to study the microbial load. After visiting such plant in his locality, he makes a simplified diagram of the STP for his project. Study the diagram given below and answer the following questions.

1. In the diagram 'A' denotes:

1. Aeration tank.
2. Primary settling tank.
3. Secondary settling tank.
4. Sludge digester.

2. Which of the following is incorrect regarding the sludge released from A?

1. It is formed after primary treatment.
2. It does not require aeration.
3. It possesses floes of decomposer microbes.
4. It is used in landfills.

3. A large number of aerobic heterotrophic microbes grow in:

1. A
2. B
3. C
4. Both (a) and (b).

4. What is denoted by 'D' in the given diagram?

1. Primary sludge.
2. Primary effluent.
3. Activated sludge.
4. Secondary effluent.

5. Assertion: The colloided and finely suspended matter of sewage form aggregates which are called floes.

Reason: Floes contain masses of bacteria, slime and fungal filaments.

1. Both assertion and reason are true and reason is the correct explanation of assertion.
2. Both assertion and reason are true but reason is not the correct explanation of assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.