OSSSC TGT Science CBZ Mock Test - 3 - OTET MCQ

Playing games along with studies in school is very important for the physical growth and balance of the children. It also develops in them qualities like cooperation and spirit of teamwork to work with each other.

The concrete operational stage is defined as the stage of child development in which a child starts performing mental operations and starts thinking logically. This stage occurs in children at the age of 7 – 11 years.

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.'

Schools should cater to individual differences to understand why students are able or unable to learn. The objective of education is to provide the fullest possible development for each learner. Education fosters morality, creativity, innovativeness, imaginative power, thinking ability of critical analysis, etc. Everyone has the right to education and every school should be aware of this fact. They should find suitable ways for students to learn better.
Hence, the correct answer is, 'Understand why students are able or unable to learn.'

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?'

Light, amount of oxygen and temperature are extrinsic factors responsible for the development of an organism but hormones are intrinsic factors.
So the correct option is 'Hormones.'

Thalloids have thallus(body) is not differentiated into leaves, or stem, etc. They do not have a vascular bundles also.

The gymnosperms are comparatively more ancient than the angiosperms in evolutionary terms. Most of the gymnosperms have now become extinct and the group is presently represented by only 900 living species. The living gymnosperms are widely distributed in the cold climates where snow is the source of water. Cycas and Ginkgo are referred to as living fossils.

During this process, the electrons in water are removed and passed to the reaction center chlorophyll. The associated hydrogen ions are released from the water molecule, and after two water molecules are thus split, the oxygen atoms join to form molecular oxygen (O2), a waste product of photosynthesis.

Each photosystem has all the pigments (except one molecule of chlorophyll a) forming a light harvesting system also called antennae. These pigments help to make photosynthesis more efficient by absorbing different wavelengths of light.

• Gibberellic acid is a Terpene.
• All known gibberellins are diterpenoid acids that are synthesized by the terpenoid pathway in plastids and then modified in the endoplasmic reticulum and cytosol until they reach their biologically-active form.
• All gibberellins are derived via the ent-gibberellane skeleton, but are synthesized via ent-kaurene.

The NADPH2 is synthesized in non-cyclic photophosphorylation in the light phase of photosynthesis. This is used subsequently in the dark phase to reduce carbon dioxide into sugars. NADPH2 is also called as reducing power. The substance provides the hydrogen molecules to perform reduction of the other substance. 

Thus, the correct answer is option D.

Respiration is a catabolic process, which oxidises reduced substrates, thus, resulting in the energy stored in reduced substrates. The reduced substrates are produced by the process of photosynthesis occurring in green plants and the reduced substrates are oxidised through respiration releasing CO₂, water vapour and energy in the form of ATP.
So, the correct answer is 'It liberates CO₂'

• In cycas, the type of root present is called coralloid root.
• Coralloid roots are short and irregularly branched.
• They exist in symbiotic association with cyanobacteria that help them in the fixation of Nitrogen.

Hence, the correct option is D.

NCERT Reference: Topic “GYMNOSPERMS” of chapter Plant Kingdom.

During non-cyclic electron flow, the electron hole in P-680 (reaction center of pigment system- II) is filled by electrons obtained by photolysis of water. The photolysis is an oxidative process and means splitting of water in the presence of light to form oxygen, protons and electrons. As a result, there is the evolution of oxygen and the electron move through Mn-protein bound to PS- II.

Earth crust is the reservoir of sedimentary type of nutrients like phosphorus. Atmosphere is the reservoir of gaseous types of cycle like oxygen and nitrogen along with carbon.

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.

 Glucose+Galactose

1. Lactose is a disaccharide that breaks down into two saccharides, glucose and galactose on hydrolysis.
2. Both saccharides are joined by a beta glycosidic link.
3. It is a natural sugar found in milk in amounts ranging from 2 to 8%.
4. Lactose is a reducing sugar because it contains one free hemiacetal hydroxide.
5. Hence, it is the correct option.

• 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.

(i) Methanogens are archaebacteria which produce methane in marshy areas.
(ii) Nostoc is a filamentous blue-green alga which fixes atmospheric nitrogen.
(iv) Mycoplasma lack a cell wall.
Statement (iii) "Chemosynthetic autotrophic bacteria synthesize cellulose from glucose" is incorrect. Chemosynthetic autotrophic bacteria obtain energy through the oxidation of inorganic compounds and do not synthesize cellulose from glucose. Cellulose synthesis is typically performed by organisms such as plants and some bacteria, but not specifically by chemosynthetic autotrophic bacteria.

Slimemoulds do not have chlorophyll. They are surrounded by the plasma membrane only (somatic parts are without cell walls). The slime moulds live usually amongst decaying vegetation. They are quite common on lawns and moist fields. They exhibit wide range of colouration. They have phagotrophic or saprotrophic nutrition. Parasitic forms are not known (Bold et all, 1987). Both asexual and sexual modes of reproduction are found. They produce spores within sporangia. A spore possesses a cell wall of cellulose.

• Biological systematics is the study of the diversification of living forms from both the past and the present.
• It also exhibits the relationships among living things through time. 
• Different kinds of organisms and their diversities, but also the relationships among them is refered to as systematics.

Hence, the correct option is "C" i.e. Diversity of organisms and their relationships.

Parthenocarpy is the development of fruit without fertilisation. Parthenocarpic fruits are seedless because they develop without the ovules being fertilised. This can occur naturally or be induced through the application of growth hormones.

The place where a particular organism lives called a habitat.

• It is a place where an organism can find shelter, food, mates for reproduction and, protection from predators.
• It depends on both biological and physical factors present within it.

FSH (follicle stimulating hormone) stimulates Sertoli cells to secrete spermatogenic substance. Sertoli cells function as nurse cells for differentiating spermatozoa.

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.

Particle size of true solution is very less due to which it don't scatter the light therefore path of beam of light is not visible through a true solution.

Fluorine is a halogen, which is group 17 on the periodic table, and the halogen are the most reactive.

In our atmosphere , presence of 78 % nitrogen after then presence of oxygen 21 % others 1 %. so the abundant non metal is oxygen