OSSSC TGT Science CBZ Mock Test - 9 - OTET MCQ

A documentary provides actual facts related to the topic. Thus, a documentary on water pollution is the most suitable way for teaching the topic.

Spatial intelligence gives the ability to control and form various mental images. It is related to the multiple intelligence theory.

While storytelling, a teacher maintains a natural sequence so that children take more interest in the class. The nature of human beings is that they take more interest in realistic things. Characters of the story should be properly elaborated so that while listening to the story it will easily be understandable by others. 
Hence, the correct answer is "All of the above".

The carbon dioxide is fixed during dark phase of photosynthesis using reducing and assimilatory power synthesized during light phase. The initial carboxylating enzyme is PEP carboxylase in C4 plants. It carboxylates PEP or phosphoenolpyruvate and produces organic acids having four carbon atoms.

There is clear division of labour within the chloroplast. the membrane system is responsible for the light reaction ( trapping light energy and synthesis of ATP and NADPH) while dark reaction i.e., enzymatic reactions for the reduction of carbon dioxide into sugar using ATP and NADPH take place in the stroma.

The key features of plant photosynthesis were known, namely, that plants could use light energy to make carbohydrates C₆H₁₂O₆ from CO₂ and water,  Where C₆H₁₂O₆ represents glucose.

C₄ plants show some special adaptations to survive extreme climate, such as tolerance of higher temperatures, response to high intensity lights, lack of photorespiration and greater productivity of biomass.

• Prothallus is a free-living, mostly photosynthetic thalloid gametophyte.
• It is formed during the life cycle of Pteridophyte.
• The pteridophyte is a sporophyte i.e. the main plant body is diploid
• These spores formed inside the sporangia which are borne on the sporophylls.
• The germination of spores is exosporic i.e. in the soil.
• These spores germinate to form the gametophyte which is haploid.
• The gametophyte formed is called prothallus and it is independent as the germination took place outside the sporophyte body in the soil.
• Prothallus male and female sex organs are called antheridia and archegonia, respectively.
• Water is required for the transfer of antherozoids – the male gametes released from the antheridia to the mouth of the archegonium.
• Fusion of the male gamete with the egg present in the archegonium results in the formation of a zygote.
• The zygote thereafter produces a multicellular well-differentiated sporophyte which is the dominant phase of the pteridophytes.
• The sporophytic plant undergoes meiosis to form haploid spores.
• Haploid spores divide by mitosis to form a haploid gametophyte once again. 

So, the correct answer is option 3, A gametophyte-free living structure formed in pteridophytes.

The plant shown above is cycas. This plant belongs to division cycadophyta and family cycadceae. It is diecious and native to India.

The process of respiration is expressed as:
Glucose + Oxygen → Carbon Dioxide + Water (+ Energy)

Fermentation of carbohydrates such as glucose, lactose, sucrose produces lactic acid.
So the correct option is 'Fermentation.'

Respiration is an oxidative process in which repiratory substrates are oxidised to liberate energy inside the living cells. The common respiratory substrates are carbohydrates, proteins, fats and organic acids. The most common respiratory substrates are carbohydrates, proteins, fats and organic acids. The most common respiratory substrate is glucose.

Sphaerosome, lysosome and glyoxysome are bounded by single membrane.

• Gametes are formed by meiosis of germ cells. Hence, they are haploid.
• Gametes are produced through the process of meiosis.
• In males, gametes are produced in testes and in females, gametes are produced in ovaries.
• Since gametes are formed through meiosis, they undergo two set of divisions: meiosis I and meiosis II. 
• During meiosis, recombination occurs in which homologous pairs of chromosomes exchange their segments. Since gametes are formed through meiosis, therefore they have chromosomes that have undergone recombination.

A cell wall is a layer located outside the cell membrane found in plants, fungi, bacteria, algae, and archaea. A peptidoglycan cell wall composed of disaccharides and amino acids gives bacteria structural support. The bacterial cell wall is often a target for antibiotic treatment.

Autolysis, caused by the lysosomal enzymes, plays a role in the disappearance of tail during the metam orphosis of frog's tadpole, and in softening of gum tissue to allow eruption of teeth in vertebrates. For autolysis, enzymes of primaryly so somes are  released from the cell. Autolysis occur in ageing, dead and diseased cells.

A synergid cell wall forms a highly thickened structure called the filiform apparatus at the micropylar end consisting of numerous finger-like projections into synergid cytoplasm. These synergid cells are necessary for pollen tube guidance in the ovule.

The interaction among organisms is necessary for survival within their environment. Survival is the state of being alive. Organisms are inter-depending on one another of their well-being.

Oxytocin hormone is released by foetal ejection reflex from maternal pituitary gland that causes stronger and stronger uterine contraction that leads to ejection of baby through birth canal.

Low temperature preserves the enzymes in their inactive state. Therefore it is used in preservation of foods inside cold storage. Low temperature present inside cold storage prevents spoilage of food.

High temperature destroys enzymes by causing their denaturation, This occurs at 50^oC or so. In between the minimum and maximum temperature the reaction velocity doubles for every 10^oC in temperature (general rule of thumb).

A natural association of interdependent populations of different species inhabiting a common environment of habitat as a viable, self-contained unit is called a biotic community of biocoenosis.

The SER provides surface for the synthesis of  including phospholipids, cholesterol, steroid hormones and hormones, adrenal corticoid hormones), ascorbic acid are visual pigments.

The binomial nomenclature system, which involves giving each species a two-part scientific name, was introduced by Carl Linnaeus, a Swedish botanist, and zoologist.

Hence, the Correct Answer is C
NCERT Reference: Topic- Binomial Nomenclature from chapter "The Living world" of NCERT.

The population density in a given habitat and at a particular time period, fluctuates due to the changes in four basic processes given below:-

1. Natality- It refers to the number of births take place in a population during a given period.

2. Mortality- It refers to the number of deaths take place in a population during a given period.

3. Immigration- It refers to the number of individuals of the same species have migrated into the habitat from somewhere else during a particular time period.

4. Emigration- It refers to the number of individuals of the same species have migrated out of the habitat during a given time period.

Natality and immigration add to the population density whereas mortality and emigration decrease the population density.

Virus particles contain the viral genome packaged in a protein coat called the capsid. For some viruses, the capsid is surrounded by lipid bilayer that contains viral proteins, usually including the proteins that enable the virus to bind to the host cells.

Hydrogen gas is released.