OAVS TGT Science Mock Test - 6 - OTET MCQ

The Bombay Duck fish is a lizard fish which is known  by many names such as Bummalo, Loytta, Bombil etc.

The Hilsa fish  is  a very popular  food fish in South Asia. It is also known by many names such as Ilish, Hilsa herring, Hilsa Shad, Ellis, Modar etc.

Bombay duck and Hilsa are prime example of marine fish as they are found  in salt water such as oceans or salt lakes, although the two varieties of hilsa namely Tenualosa ilisha and Tenualosa toli ilisha are found both in  marine and fresh waters of Bangladesh.

At high temperature and high pressure Krypton and Xenon forms some compounds like Xenon, Tetrafluride, xenon Oxyfluride. 

Tidal energy is harnessed by constructing a dam near the shores across narrow opening it

The chemical formula for the plaster of Paris is
and is better known as calcium sulfate hemihydrate.

Analysis of Mitochondrial Membranes

- Outer Mitochondrial Membrane: The outer mitochondrial membrane is quite porous because of the presence of many integral proteins known as porins. These proteins form channels that allow the free diffusion of molecules and ions up to a certain size, including small proteins.

- Inner Mitochondrial Membrane: The inner mitochondrial membrane is deeply folded, forming structures known as cristae. These folds increase the surface area of the membrane, thereby enhancing the ability of the mitochondria to produce ATP (adenosine triphosphate), which is the energy currency of the cell.

- Length of Membranes: The statement that the outer membrane is longer than the inner membrane is not correct. The length of the membranes is not a distinct feature of mitochondria. Instead, the inner membrane has more surface area due to its folds or cristae.

- Number of Membranes: Mitochondria are double-membraned organelles. They have an outer membrane and an inner membrane, separated by an intermembrane space. The statement that mitochondria mostly have a single membrane is incorrect.

So, based on the analysis, the correct statement regarding mitochondrial membranes is "The outer membrane is porous while the inner membrane is deeply folded".the inner membrane has more curls and turns compared to outer membrane , you can also take reference of brain(it has many curls and turns(neurons) and many experts say that our brains' neurons are much longer in length of our inner intestine(inner intestine measures 7 meters)).

Nonmetals are present on the right hand side of the periodic table. They are usually solids or gases at room temperature with low melting and boiling points (boron and carbon are exceptions). The only liquid non-metal is bromine. Most non-metals are brittle and are neither malleable nor ductile. 

Bleaching powder is primarily used in the textile industry and laundry for whitening soiled clothes. Its bleaching properties make it effective for this purpose, helping to restore the whiteness of fabrics.

The three biologists who independently rediscovered Mendel's principles in 1900 AD were Hugo de Vries, Carl Correns, and Erich Tschermak. Let's break down the answer into headings and bullet points for a clear and organized explanation:
Rediscovery of Mendel's Principles:
- In 1865, Gregor Mendel, an Austrian monk, published his groundbreaking work on the principles of inheritance, now known as Mendelian genetics.
- However, Mendel's work went largely unnoticed until the turn of the 20th century when three biologists independently rediscovered his principles.
The Three Biologists:
1. Hugo de Vries:
- Hugo de Vries was a Dutch botanist who rediscovered Mendel's laws of inheritance in 1900.
- He was studying the inheritance patterns of evening primroses (Oenothera lamarckiana) when he noticed the occurrence of distinct traits in the offspring, which aligned with Mendel's principles.
- De Vries coined the term "mutation" and proposed the theory of mutationism, which suggested that new species arise from sudden, large-scale changes in genetic material.
2. Carl Correns:
- Carl Correns was a German botanist who also independently rediscovered Mendel's principles in 1900.
- Correns was working with the plant species Four o'clock (Mirabilis jalapa) and observed patterns of inheritance that were consistent with Mendel's laws.
- He conducted experiments to verify the laws of segregation and independent assortment proposed by Mendel.
3. Erich Tschermak:
- Erich Tschermak, an Austrian botanist, was the third biologist to rediscover Mendel's principles in 1900.
- Tschermak was conducting experiments with peas similar to Mendel's original work when he independently arrived at Mendel's laws of inheritance.
- He published his findings, acknowledging the prior work of Mendel.
Conclusion:
In summary, the three biologists who independently rediscovered Mendel's principles in 1900 AD were Hugo de Vries, Carl Correns, and Erich Tschermak. Their rediscovery played a crucial role in establishing the field of modern genetics and solidifying the importance of Mendel's work.

The mass number, also called atomic mass number or nucleon number, is the total number of protons and neutrons in an atomic nucleus. It is approximately equal to the atomic mass of the atom expressed in atomic mass units.

The solution on which the solute is more than the solvent .It is called concentrated solution. Concentrated solution is a solution that contains a large amount of solute relative to the amount that could dissolve.

Geothermal energy is feasible in regions that:
- Are over hot spots in the crust: Geothermal energy is harnessed from the heat generated by the Earth's core. Hot spots in the crust, such as areas near volcanoes or areas with significant tectonic activity, have higher geothermal energy potential.
- Have thermal: Geothermal energy is derived from the heat stored within the Earth. Regions that have thermal energy reservoirs, such as areas with high temperatures underground, are suitable for geothermal energy production.
- Are near the sea: Coastal areas have the potential to utilize geothermal energy through the process of ocean thermal energy conversion (OTEC). This technology harnesses the temperature difference between warm surface waters and cold deep waters to generate electricity.
- Do not have coal mines: The presence of coal mines is not a requirement for geothermal energy feasibility. Geothermal energy relies on the Earth's natural heat, whereas coal mining is related to the extraction of fossil fuel for energy production.
Overall, geothermal energy is most feasible in regions that have hot spots in the crust, thermal energy reservoirs, and proximity to the sea. These factors contribute to a higher potential for geothermal energy generation and utilization.

Insulin, a hormone produced by the pancreas, plays a crucial role in regulating blood sugar levels in the body. It facilitates the uptake of glucose from the bloodstream into cells, thereby lowering blood sugar levels. Imbalances in insulin production or function can lead to conditions like diabetes mellitus, where blood sugar levels are not properly controlled. ---

The given equation is a displacement reaction in which Fe of Fe₂O₃ has been displaced by Al. Hence, (c) is the correct option.

Because it is a saturated hydrocarbon and saturated ones doesn't go addition. But it will undergo substitution reaction.

Yes, homogenous mixture have a variable composition as the constituents are present in any ratio such as 1:2 or 1:3 etc

Glucose, amino acids, and salts are selectively re-absorbed from the initial filtrate in the kidneys.

Boiling point of water decreases with increase in altitude. At the top of mountain where the atmospheric pressure is less than 1 atm water boils below 100⁰C.

The bone marrow is composed of:
A: Muscle fibres and adipose tissue
- This is incorrect. Muscle fibres and adipose tissue are not components of bone marrow.
B: Areolar tissue and adipose tissue
- This is incorrect. Areolar tissue and adipose tissue are not components of bone marrow.
C: Adipose tissue and calcified cartilage
- This is incorrect. Calcified cartilage is not a component of bone marrow.
D: Adipose tissue, areolar tissue and blood vessels
- This is correct. Bone marrow is composed of:
- Adipose tissue: This is the main component of bone marrow and provides cushioning and support to the bone.
- Areolar tissue: This loose connective tissue helps in providing structural support to the bone marrow.
- Blood vessels: Bone marrow contains a network of blood vessels that supply oxygen and nutrients to the cells within the marrow.
In conclusion, the correct answer is D: Adipose tissue, areolar tissue, and blood vessels are the components of bone marrow.

Malleability: The property of metals by which they can be beaten into thin sheets is known as malleability.
For example, silver metal is beaten to make silver foil used for decorating sweets.

The pH of the  extracellular fluid, including the blood plasma, is normally tightly regulated between  7.32 and 7.42 , by the chemical buffers, the respiratory system, and the renal system. 
So, the correct answer is Alkaline.

After sharing four electrons with four univalent atoms, carbon has 6 + 4 = 10 electrons.
Neon also contains 10 electrons

The chemical formula for Plaster of Paris is CaSO₄. ½ H₂O. When gypsum is heated to a certain temperature, it undergoes a reaction to yield CaSO₄. ½ H₂O, which is the compound that forms Plaster of Paris. This compound indicates that two units of CaSO4 share one molecule of water, giving it its specific chemical composition.

Graphite is an interesting material, an allotrope of carbon (as is diamond). It displays properties of both metals, and nonmetals. However, like a metal, graphite is a very good conductor of electricity due to the mobility of the electrons in its outer valence shells.

The law of triads does not apply to Ru, Rh, Pt.

 

Carat is a unit of mass and is used for measuring gemstones and pearls.  1 ct. = 200 mg

Reflex actions are primarily characterized by being triggered by environmental stimuli without the need for conscious thought or a perceived sense of control. These actions are rapid and occur involuntarily in response to specific stimuli. For example, quickly withdrawing a hand from a hot surface is a reflex action that aims to protect the body from harm without the delay of conscious processing.

Hydropower facilities can have large environmental impacts by changing the environment and affecting land use, homes, and natural habitats in the dam area. Most hydroelectric power plants have a dam and a reservoir.

Many scientists describe a "transition metal" as any element in the d-block of the periodic table, which includes groups 3 to 12 on the periodic table. In actual practice, the f-block lanthanide and actinide series are also considered transition metals and are called "inner transition metals".

There are a number of properties shared by the transition elements that are not found in other elements, which results from the partially filled d shell. These include
1. the formation of compounds whose color is due to d–d electronic transitions
2. the formation of compounds in many oxidation states, due to the relatively low energy gap between different possible oxidation states[
3. the formation of many paramagnetic compounds due to the presence of unpaired d electrons. A few compounds of main group elements are also paramagnetic (e.g. nitric oxide, oxygen)

Key Points:
- Butanone is a four-carbon compound.
- We need to identify the functional group present in butanone.
Explanation:
1. Butanone is a four-carbon compound, which means it contains four carbon atoms.
2. To identify the functional group present in butanone, we need to look for any specific groups attached to the carbon atoms.
3. The functional group in butanone is a ketone group.
4. A ketone is a carbonyl group (C=O) attached to two carbon atoms.
5. In butanone, the carbonyl group is attached to the second carbon atom, making it a ketone.
6. Therefore, the correct answer is C: Ketone.
Answer: C: Ketone

Isotopes are the atoms of the same element with similar atomic number but different atomic mass.The elements of isotopes share same chemical properties but different physical properties