OSSSC TGT Science CBZ Mock Test - 3 - OTET MCQ

Context is the spoken or written form of material that can be used for teaching Grammar.

The three methods most commonly used by Developmental Psychologists to study children are 
i) Cross sectional studies: Comparisons are made of the behaviour or abilities of two or more different groups of children, with each group covering a different age range.
ii) Longitudinal studies:  a group of children is followed up across time, this could be a relatively short period of several months, or in some cases for decades
iii) Case Studies: one or a very small number of children are seen regularly over a period of time. The time period is variable but usually is six months or more in length. 
These all come under comparative methods.

Learning disabilities in Mathematics can be assessed most appropriately by the diagnostic test. 
A diagnostic test is a test that is used to measure the level of understanding a student possess regarding any subject area. Teachers conduct diagnostic tests for reading and maths skills and use these results to provide remedial instructions or classes to students as per their level.
Hence, the correct answer is, 'Diagnostic Test.'

Teachers must be aware of the fact that every child is different from each other. The differences occur from physical characteristics to learning style and ability. The objective of education is to provide the fullest possible development of learners. So, to address the individual differences in students a school should follow a child-centered curriculum and provide multiple learning opportunities to students. The teachers should find out the different strengths and weaknesses of students before adopting an appropriate curriculum.
Hence, the correct answer is, 'Follow a child-centered curriculum and provide multiple learning opportunities to students.'

Continuous Comprehensive Evaluation is a school-based evaluation system. It promotes orderly learning and development. It includes regularity in assessment, diagnosis of learning gaps, retesting, etc. So, CCE emphasizes how learning can be observed, recorded, and improved upon. It is a 'continuous' process after each course over the entire session. 'Comprehensive' means the scheme follows both scholastic and co-scholastic aspects of students.
Hence, the correct answer is, 'How learning can be observed, recorded and improved upon.'

A teacher should take care of each child irrespective of their disabilities. He/she should ensure the students' maximum potential. Everyone has the right to education. A teacher should ensure that his/her students derive maximum benefit from education. 
Teachers must be aware of the fact that every child is different from each other. The differences occur from physical characteristics to learning styles. The objective of education is to provide the fullest possible development of learners. The teachers should find out the different strengths and weaknesses of students before their disabilities.
Hence, the correct answer is, 'Mohan, why don't you use your crutches to go to the playground?'

Biosynthetic phase (dark or Blackman's reaction) catalyses assimilation of CO2 to carbohydrates. The reactions are called carbon reactions. They occur in stroma of chloroplasts. The reactions do not require light. Instead assimilatory power (ATP and NADPH ) produced during photo chemical phase is used in fixation and reduction of carbon dioxide. All the enzymes required for the process are present in the matrix or stoma of the chloroplast. So, the correct answer is 'it does not directly depend on light energy'.

• Electrons from excited chlorphyll molecule of photosystem II are accepted first by Quinone.
• Photosystem II is a photosynthetic pigment system along with some electron carriers that is located in the appressed part of the grana thylakoids.
• Photosystem II has chlorophyll a, b and carotenoids. Other components of PS II are phaeophytin, plastoquinone (PQ), cytochrome complex and blue coloured copper-containing plastocyanin.

2, 4 D are widely used as herbicides. It is widely used to kill dicotyledonous weeds, does not affect mature monocotyledonous plants.

ATP is known as energy currency of living cells because energy produced during respiration is stored in form of ATP , which can be utilized for performing different activities.

Citric acid cycle or C_3cycle start with pyruvate and leads to complete oxidation of glucose to carbon dioxide and energy in form of ATP, NADH and FADH₂. At end of citric acid cycle, most of the energy is transferred to NADH and FADH₂.

Respiratory Quotient is CO₂/O₂
The respiratory quotient (R.Q) is the ratio of CO₂ produced to O₂ consumed, while food is being metabolized.
RQ = CO₂  eliminated / O₂ consumed
R.Q for proteins is less than 1 since, amount of CO₂ evolved is lesser than amount  O₂ consumed.
When organic acids are broken down as respiratory substrates under aerobic conditions the R.Q is more than one. Organic acids contain more oxygen than carbohydrates and therefore require less oxygen for their oxidation.

Isomerases catalyse the change of a substrate into a related isomeric form by rearrangement of molecules.

The mature anther consists of four microsporangia which contain four layers. The inner most layer is called tapetum that provide nutrient to growing microspores and tissues inside it are called microspore mother cell that produce pollen grain.

• Some chromosomes have secondary constrictions which are non-staining, apart from the centromere.
• They give the appearance of a small fragment.
• This small fragment is known as a satellite.

• Spore mother cells: Meiosis is a type of cell division that occurs in spore mother cells. These cells undergo meiosis to produce haploid spores, which will later develop into gametes.

Nucleus controls the activity of cytoplasm by sending RNA. The nucleus pores allows the movement of large molecules such as proteins and RNA through the pores is required for both gene expression and the maintenance of chromosomes. The interior of the nucleus does not contain any membrane-bound sub compartments, its contents are not uniform, and a number of sub-nuclear bodies exist, made up of unique proteins, RNA molecules, and particular parts of the chromosomes. The best-known of these is the nucleolus, which is mainly involved in the assembly of ribosomes. After being produced in the nucleolus, ribosomes are exported to the cytoplasm where they translate mRNA.

The statement is true. In binomial nomenclature, the first part of the name indicates the genus to which the organism belongs, while the second part, the specific epithet, identifies the species within the genus.

The female gametophyte in angiosperms plants is called Embryo sac.

The female gametophyte of flowering plants, which produces the two female gametes – the egg cell and central cell – for double-fertilization by the two sperm cells of the male gametophyte (pollen grain).

Hence the correct option is 'C' 

Ideogram is a photograph or diagram of metaphases chromosomes of an organism arranged in homologous pair according to their length, thickness and position of centromere, length of arm, shape and other characteristics. The sex chromosomes are usually placed at the end.

• Carl Linnaeus was a Swedish botanist, physician and zoologist, who laid the foundations for the modern biological naming scheme of biological nomenclature.
• He is known as the father of taxonomy and is also considered one of the fathers of modern ecology.
• In botany, the author abbreviation used to indicate Linnaeus as the authority for the species name. In older publications, sometimes the abbreviation "Linn" is found. Hence, L signifies the taxonomist, Linneaus.

Hence, the Correct Answer is C

Mitochondria and chloroplast contain theirown genetic material. Genetic material is mainly present in nucleus of the cell but these two cell organelles also contain own genetic material.

Collagen is a fibrous protein. It is the main structural protein in the extracellular space in thevarious connective tissues. It is the most abundant protein in mammals.

The general formula of monohydric alcohols is C_nH2_n+1OH where n = 1, 2, 3… etc.. or R-OH where R is any alkyl group.
Alcohols are formed by replacement of 1 hydrogen atom from hydrocarbons.

A burning splinter since hydrogen gas burns with a pop sound.

Zinc being an active metal readily reacts with hydrochloric acid at room temperature to form soluble zinc chloride and hydrogen.

Zn + 2HCl → ZnCl₂ + H₂.

So Option C is correct

The strength of an acid or base can be estimated using a universal indicator by observing the color change of the indicator. Universal indicator is a mixture of several indicators that display different colors at different concentrations of H⁺ ions in the solution. This color change helps in determining whether the solution is acidic, basic, or neutral.

Particles of solids have a very high force of attraction, particles of liquid have less force of attraction than solids and particles of gases have very less force of attraction. So the correct order of increasing attraction between particles is Oxygen, water and sugar.

Carnallite is an evaporite mineral a hydrated potassium magnesium chloride. It is variably colored yellow to white, reddish or blue. It occurs with a sequence of potassium and magnesium evaporite.

Conversion of methane to Carbon tetrachloride is a substitution reaction as hydrogen atoms are replaced by chlorine atoms.