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OAVS TGT Science Mock Test - 3 - OTET MCQ


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30 Questions MCQ Test - OAVS TGT Science Mock Test - 3

OAVS TGT Science Mock Test - 3 for OTET 2025 is part of OTET preparation. The OAVS TGT Science Mock Test - 3 questions and answers have been prepared according to the OTET exam syllabus.The OAVS TGT Science Mock Test - 3 MCQs are made for OTET 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for OAVS TGT Science Mock Test - 3 below.
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OAVS TGT Science Mock Test - 3 - Question 1
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Ethanol on complete oxidation gives

Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 1

The correct option is A.
Ethanol is oxidised to produce ethanal by removing two hydrogen atoms. Ethanal is then oxidised to produce ethanoic acid, by adding an oxygen atom.

OAVS TGT Science Mock Test - 3 - Question 2
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Expand the abbreviation GAP

Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 2
Explanation:
The abbreviation GAP can have multiple expansions depending on the context. Here are the possible expansions for the given options:
Option A: Governmental Agency for Pollution Control
- This expansion refers to a governmental organization responsible for controlling and regulating pollution.
Option B: Gross Assimilation by Photosynthesis
- This expansion refers to the process of photosynthesis where plants convert carbon dioxide and water into glucose and oxygen.
Option C: Ganga Action Plan
- This expansion refers to a comprehensive plan launched by the Indian government to clean and restore the river Ganges, also known as the Ganga.
Option D: Governmental Agency for Animal Protection
- This expansion refers to a governmental organization responsible for the protection and welfare of animals.
Answer: C: Ganga Action Plan
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OAVS TGT Science Mock Test - 3 - Question 3
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To protect tooth decay, we are advised to brush our teeth regularly. The nature of the toothpaste commonly used is:

Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 3

Decay of teeth is because of the sweetening agents we eat as it increases the acidity inside the mouth, which can be prevented if the toothpaste used is alkaline or basic in nature. Baking soda or sodium hydrogen carbonate is also used to clean the teeth as it is alkaline in nature.

OAVS TGT Science Mock Test - 3 - Question 4
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Considering tallness and dwarfness, tallness is more wide spread among pea plants because :-
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 4
Explanation:
To explain why tallness is more widespread among pea plants, we need to consider the factors that contribute to pea plant height inheritance.
1. Tallness is dominant over dwarfness:
- This means that if a pea plant inherits the tall allele from one parent, it will exhibit the tall phenotype, even if it also inherits the dwarf allele from the other parent.
- On the other hand, for a pea plant to exhibit the dwarf phenotype, it needs to inherit the dwarf allele from both parents.
- Since tallness is dominant, it is more likely for pea plants to exhibit the tall phenotype.
2. Tallness is determined by one gene having many effects:
- In some cases, a single gene can have multiple effects on an organism's phenotype.
- If tallness in pea plants is determined by a single gene that has multiple effects, it increases the likelihood of the tall phenotype being expressed.
3. Tallness is determined by many genes having multiple effects:
- In some cases, a trait like height can be influenced by multiple genes, each contributing to the overall phenotype.
- If tallness in pea plants is determined by many genes that have multiple effects, it increases the complexity of inheritance patterns and the likelihood of the tall phenotype being expressed.
Based on these factors, the most likely explanation for tallness being more widespread among pea plants is that tallness is dominant over dwarfness. This means that even if a pea plant inherits the dwarf allele from one parent, it can still exhibit the tall phenotype if it inherits the tall allele from the other parent.
OAVS TGT Science Mock Test - 3 - Question 5
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The range of vision of a normal human eye is from
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 5

Range of vision for a normal human eye is between its near point and far point i.e, from 25cm to infinity.

OAVS TGT Science Mock Test - 3 - Question 6
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What is a significant physical change experienced by girls during puberty?
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 6
One significant physical change experienced by girls during puberty is breast enlargement. This is a result of the development of mammary glands and the accumulation of fatty tissue in the breasts. It is a normal part of female sexual maturation and a key characteristic of this phase.
OAVS TGT Science Mock Test - 3 - Question 7
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On increasing the temperature of the liquid the rate of evaporation is –
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 7

The higher the temperature of liquid, the faster the rate of evaporation. This is due to the fact that as the liquid's temperature increase, the molecule of the liquid move about faster, thus increasing the rate of evaporation.

OAVS TGT Science Mock Test - 3 - Question 8
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Which of the following sequences is truly a systemic circulation pathway?
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 8
Systemic circulation carries blood from the heart to the tissues and then carries deoxygenated blood from tissues towards the heart. It helps to distribute the nutrients to different tissues and picks the carbon dioxide and waste. Systemic circulation involves the movement of blood from lungs to the left auricle through pulmonary vein, which is then pumped to the left ventricle. From here the blood goes through the aorta which divides into arteries. The arteries carry the blood towards the tissues and the deoxygenated blood is returned to the right auricle through veins. Thus the correct option is (b)
OAVS TGT Science Mock Test - 3 - Question 9
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What is the function of the hormone melatonin produced by the pineal gland in the human body?
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 9
Melatonin, the hormone secreted by the pineal gland, is primarily known for its role in regulating sleep patterns. This hormone helps in controlling the circadian rhythm, the body's internal clock that dictates when we feel sleepy or awake. Melatonin levels typically rise in the evening, signaling the body that it is time to sleep, and decrease in the morning to promote wakefulness.
OAVS TGT Science Mock Test - 3 - Question 10
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A plant cell becomes swollen due to:
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 10

Hypotonic solutions are the ones which have a lower concentration of solute than the inside the cell. Water diffuses into the cell to balance the solute concentration on either side (outside and inside) equal. Here the cell swells up due to entry of water by endosmosis. 

OAVS TGT Science Mock Test - 3 - Question 11
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Unsaturated carbon compounds on combustion give:
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 11

Unsaturated hydrocarbons like ethyne also known as acetylene burn to produce a yellow sooty flame due to incomplete combustion in air.

The flame is sooty because the percentage of carbon is comparatively higher than that of alkanes and so does not get completely oxidized in air.

OAVS TGT Science Mock Test - 3 - Question 12
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The elements of group 16 are called
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 12

The group 16 elements of modern periodic table consist of 5 elements oxygen, sulphur, selenium, tellurium and polonium. The elements in this group are also known as the chalcogens. 

OAVS TGT Science Mock Test - 3 - Question 13
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Spreading of fragrance of a burning incense stick in a room shows that:
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 13

When we light an incense stick in one corner of room its fragrance spreads in the whole room because of the process involved DIFFUSION. It is because particles of matter are continuously moving in the air. Its parties vigorously spread and we can smell its fragrance in the whole room.

OAVS TGT Science Mock Test - 3 - Question 14
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What defines an ecosystem and its components, including both living and non-living elements interacting to maintain a balance in nature?
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 14
An ecosystem comprises both biotic (living organisms) and abiotic (physical factors) components that interact and influence each other. This interconnected system includes plants, animals, microorganisms, physical surroundings like temperature, soil, and minerals. The balance in nature is maintained through the interactions between these living and non-living elements.
OAVS TGT Science Mock Test - 3 - Question 15
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Which muscles act involuntarily?
(i) Striated muscles
(ii) Smooth muscles
(iii) Cardiac muscles
(iv) Skeletal muscles
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 15

Smooth muscles (ii) and cardiac muscles (iii) are involuntary muscles. Striated muscles (skeletal muscles) are generally under voluntary control.

OAVS TGT Science Mock Test - 3 - Question 16
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Areolar connective tissue is found:
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 16

Areolar connective tissue is a versatile tissue found between the skin and muscles, around blood vessels, and in various other locations. It provides support and flexibility.

OAVS TGT Science Mock Test - 3 - Question 17
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What is the physical state of water at 100°C?
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 17

At 100°C, water exists in both the liquid state as well as in gaseous state. This is special condition because 100°C is the boiling point of water and as well as liquefaction temperature of the water vapour

OAVS TGT Science Mock Test - 3 - Question 18
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Find out the correct sentence about manure
(i) Manure contains large quantities of organic matter and small quantities of nutrients.
(ii) It increases the water holding capacity of sandy soil.
(iii) It helps in draining out of excess of water from clayey soil.
(iv) It excessive use pollutes environment because it is made of animal excretory waste.
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 18

Statement (i) and (ii) are correct because manure is prepared from the break- down of plant and animal waste products. Hence it is  rich in organic matter. Manure contributes to the fertility of the soil by adding organic - matter and some essential nutrients like N, P and K which helps in enhancing growth of plants.  Manure makes the clayey soil aerated  because of their small - pores and increase the water holding capacity of the sandy soil due to their large pore size.  . In clayey soils, the large quantities of organic matter help in drainage and in avoiding water logging. . In clayey soils, the large quantities of organic matter help in drainage and in avoiding water logging.

OAVS TGT Science Mock Test - 3 - Question 19
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Some crystals of copper sulphate were dissolved in water. The colour of the solution obtained would be
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 19

Copper sulphate aqueous solution is blue in colour .

So Option D is correct

OAVS TGT Science Mock Test - 3 - Question 20
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Which biologist proposed the cell theory along with Schwann?
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 20

The cell was first discovered by Robert Hooke in 1665 using a microscope. The first cell theory is credited to the work of Theodor Schwann and Matthias Jakob Schleiden in the 1830s.

OAVS TGT Science Mock Test - 3 - Question 21
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Which is the control centre of the cell?
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 21
Nucleus is known as control room of the cell because it control all the functions that r taking place in cell
OAVS TGT Science Mock Test - 3 - Question 22
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_________were not included in Mendeleev's periodic table.
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 22
There were many demerits in the Mendeleev periodic table,such as,isotopes were not included in his periodic table as the isotopes were discovered long after this discovery..

OAVS TGT Science Mock Test - 3 - Question 23
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Which of the following components is NOT reabsorbed selectively in the nephron?
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 23

Urea is a waste product and is not reabsorbed; instead, it is excreted in the urine. Glucose, amino acids, and salts are selectively reabsorbed.

OAVS TGT Science Mock Test - 3 - Question 24
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Trapped heat inside the earth is known as
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 24

Explanation: Geothermal energy is the heat from the earth. It’s clean and sustainable. Resources of geothermal energy range from the ground to water and hot rock. The term geothermal originates from the Greek words.

OAVS TGT Science Mock Test - 3 - Question 25
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In goitre, the thyroid gland enlarges and results in swelling in the throat region. Which epithelial tissue is involved in this condition?
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 25
Epithelial Tissue Involved in Goitre:
The epithelial tissue involved in goitre is the Glandular epithelium. Here's why:
- Goitre is characterized by the enlargement of the thyroid gland, which is a part of the endocrine system.
- The thyroid gland is composed of follicles that produce, store, and release thyroid hormones.
- The cells lining the follicles are composed of glandular epithelium.
- Glandular epithelium is specialized for secretion and is found in glands throughout the body.
- In the thyroid gland, the glandular epithelial cells produce and secrete thyroid hormones, primarily thyroxine (T4) and triiodothyronine (T3).
- When the thyroid gland is not able to produce enough thyroid hormones, it can lead to an increase in the secretion of thyroid-stimulating hormone (TSH) by the pituitary gland.
- This excess TSH stimulates the growth and enlargement of the thyroid gland, resulting in goitre.
- The swelling in the throat region is caused by the increased size of the glandular epithelial cells and the increased blood flow to the enlarged thyroid gland.
In conclusion, the glandular epithelium is involved in goitre as it is responsible for the production and secretion of thyroid hormones, which can lead to the enlargement of the thyroid gland when there is an imbalance in hormone levels.
OAVS TGT Science Mock Test - 3 - Question 26
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‘Chipko Andolan’ originated in a remote village called Reni in Garhwal in the Himalayas during the
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 26
Chipko Andolan Origin
The Chipko Andolan, also known as the Chipko Movement, originated in a remote village called Reni in Garhwal in the Himalayas during the year 1973. This grassroots environmental movement was aimed at protecting the forests from deforestation and promoting ecological conservation. Here is a detailed explanation of the Chipko Andolan's origin:
Background:
- The Chipko Andolan was a response to the rampant deforestation and commercial logging activities that were threatening the survival of the local communities and their natural resources.
- The region of Garhwal in the Indian state of Uttarakhand was heavily dependent on forests for their livelihood, as they relied on them for firewood, fodder, and other essential resources.
Key Events:
- In 1973, a government contractor arrived in Reni village with a team of workers to fell trees in the nearby forest.
- Amrita Devi, a local woman, along with other women from the village, bravely stood in front of the trees, hugging them to prevent their cutting.
- The women's act of hugging the trees and forming a human chain to protect them gained widespread attention and sparked the Chipko Andolan.
Significance:
- The Chipko Andolan gained momentum as people realized the importance of preserving forests for sustainable development and the well-being of future generations.
- The movement advocated for community-based forest management and raised awareness about the adverse effects of deforestation on the environment, biodiversity, and local communities.
- Chipko Andolan inspired similar environmental movements in other parts of India and across the world, contributing to the development of the concept of ecological activism.
In conclusion, the Chipko Andolan originated in the year 1973 in the remote village of Reni in Garhwal. It was a grassroots movement that aimed to protect forests from deforestation and promote ecological conservation. The courageous act of hugging trees by the local women gained widespread attention and sparked a larger movement for environmental preservation.
OAVS TGT Science Mock Test - 3 - Question 27
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Which one of the following elements exhibit the maximum number of valence electrons ?
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 27

The greater the valency of the element, the greater is its unreactivity. Also, the valency in a period increases from the left to the middle, then again decreases from middle to the right. So we can say that the unreactive elements are located in the center of the period. Since phosphorus and Silicon are located at the center, they have the highest number of Valence electrons, and hence are the most unreactive in the period.

OAVS TGT Science Mock Test - 3 - Question 28
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Which of the following is the monohybrid ratio :-
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 28
Monohybrid Ratio:
The monohybrid ratio refers to the ratio of phenotypes that result from a cross between two individuals heterozygous for a single gene. It is used to predict the outcome of a single trait inheritance.
Options:
A: 3 : 1
B: 9 : 7
C: 1 : 2
D: 9 : 3

To determine the correct monohybrid ratio, we need to consider the genotypes of the parents and the possible combinations of alleles that can be inherited by their offspring.
- The monohybrid ratio is determined by the inheritance pattern of a single gene.
- In this case, we are not given any specific information about the parents or the gene being considered.
- However, based on the options provided, we can eliminate options B, C, and D as they do not represent a typical monohybrid ratio.
Explanation:
A monohybrid cross involves the inheritance of a single gene from each parent. The possible combinations of alleles that can be inherited are:
- Homozygous dominant (AA)
- Heterozygous (Aa)
- Homozygous recessive (aa)
Based on these combinations, the expected phenotypic ratio for a monohybrid cross is:
- 3 individuals with the dominant phenotype (AA or Aa)
- 1 individual with the recessive phenotype (aa)
Therefore, the correct monohybrid ratio is option A: 3 : 1.
OAVS TGT Science Mock Test - 3 - Question 29
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The acid present in vinegar is
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 29

Vinegar is an aqueous solution of acetic acid. Vinegar typically contains 5–8% acetic acid by volume.

OAVS TGT Science Mock Test - 3 - Question 30
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The power generated in a windmill
Detailed Solution for OAVS TGT Science Mock Test - 3 - Question 30

The power generated in a windmill depends on the velocity of wind because power is generated by the wind. The more is the velocity of the wind, the more will be the power generated.

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