Which of the following statement is correct?

All viruses are obligate parasites, as these are active, can multiply and show the living properties only when they have entered their host cell. The term obligate indicates some type of restriction in an organism’s way of life from which it cannot depart and survive (e.g., a virus and its host).

The correct Option is "Viruses are obligate parasites"

Bacteria are always harmful to mankind

Regarding sexual reproduction in fungi. Which of the following statement is correct?

The sexual reproduction in fungi completes in three phases (i) Plasmogamy (ii) Karyogamy (iii) Meiosis Fusion of protoplasms between two motile or non-motile gametes is called plasmogamy 1. Fusion of two nuclei is called karyogamy 2. Meiosis in zygote results in the formation of haploid spores

The correct Option is "Plasmogamy followed by karyogamy"

Karyogamy followed by plasmogamy

Karyogamy and plasmogamy occur together

Sexual reproduction is absent in fungi

Which of the following statement is correct about the gametophytic stage in the alteration of generation with in the life cycle?

Gametophyte is gamete bearing, haploid multicelled stage of many plants, beginning with haploid spores and ending at fertilisation

The correct Option is "Generation that produces the gametes"

Generation that produces the spores

Generation that produces vascular tissue

Which of the following statement is correct in reference with the frog? I. Eyes are bulged and covered by nictitating membrane II. Membranous tympanum receives the sound signals III. The frog never drinks water IV. A pair of nostrils is preset above the mouth

The correct Option is "I, II, III and IV"

Which of the following statement is correct?

According to Fajans' rule, polarization of anion is influenced by charge of cation, size of cation. More is the charge on cation, more is polarization of anion.

The correct Option is "Polarization of an anion is maximum by high charged cation"

Small sized cation minimises the polarisation

A small anion brings about a large degree of polarization

A small anion undergoes a high degree of polarization

Which of the following statement is correct?

It is correct that in Agaricus, gills produce basidiospores, whereas in Cycas megasporophylls produce megaspores and microsporophylls pollen grains. In Aspergillus, fruiting body (ascocarp) is ball like ‘cleistothecium’ and in Funaria, capsule represents the sporophytic generation.

In Cycas, megasporophyll produce pollen grains

The correct Option is "In Agaricus, gills produce basidiospores"

In Aspergillus, fruiting body is perithecium

In Funaria, capsule represents gametophytic generation

Which of the following statement is correct?

Study of internal structure of plants is called anatomy. Plants have cells as the basic unit, cells are organised into tissues and in turn the tissues are organised into organs

Study of the internal structure is called anatomy

Plants have cells as the basic unit cells, are organised into tissues

Tissues are organised into organs

The correct Option is "All of the above"

Which of the following statement is correct?

The value by which the diffusion pressure of a solution is lower than that of pure solvent is known as diffusion pressure deficit. DPD or SP=OP-TP At the equilibrium TP=WP DPD=OP-WP.

The correct Option is "DPD=OP-WP"

Which of the following statement is correct? I. Many organs of aquatic plants floats in water II. Large air gaps are present in the collenchyma tissue of lotus leaf

Many organs of aquatic plant floats in water. The mesophyll between upper and lower epidermis is differentiated into palisade parenchyma and spongy parenchyma. Intercellular spaces are present among the spongy parenchymatus cells

The correct Option is "I is correct, but II is incorrect"

II is correct, but I is incorrect

Which of the following statement is correct for Iter?

It is a very narrow cavity in the brain. It is of the brain, also known as cerebral aqueduct It extends though the midbrain. It connects the third and fourth ventricles

It form a branching tree like core of white matter, called arbor vitae

It is a very narrow cavity, the cerebral aqueduct, extends through the forebrain

The correct Option is "It is a very narrow cavity, the cerebral aqueduct, extends through the midbrain"

It connects the pons varolii and cerebellum

Which of the following statement is correct about the cell wall of prokaryotic cell? I. Cell wall, if present, possesses muramic acid II. Cell wall, if presents, possesses acitic acid III. Cell wall is always absent The correct options is

In prokaryotes, cell wall is present in bacteria and cyanobacteria. A cell wall is absent in mycoplasma or PPLO. Cell wall, if present, possesses muramic acid

Which of the following statement is correct?

hCG,hpG, and relaxin are produced during pregnancy. During pregnancy the level of other hormone like oestrogen, progesterone, cortisol, prolactin, thyroxin, etc., are increased several folds in maternal blood. Increased production of these hormones is essential for supporting the foetal growth, metabolic changes in the mother and maintenance of pregnancy

hCG,hPL and relaxin are produced women only during pregnancy

During pregnancy the level of other hormones like oestrogens, progestogens, cortisol, prolactin, thyroxine, etc., are increased several folds in the maternal blood

Increased production of hcG, hPL, progesterone, etc., is essential for supporting the foetal growth, metabolic changes in the mother and maintenance of pregnancy

The correct Option is "All of the above"

Which of the following statement is correct for any thermodynamic system?

Internal energy does not change in isothermal process. $\Delta S$can be zero for adiabatic process. Work done in adiabatic process may be non-zero.

The internal energy changes in all processes

The correct Option is "Internal energy and entropy are state functions"

The change in entropy can never be zero

The work done in an adiabatic process is always zero

For a reaction, ∆H=9.08 kJ $mo{l^{ - 1}}$ and ∆S=35.7 J${K^{ - 1}}mo{l^{ - 1}}$. Which of the following statement is correct for the reaction?

∆H and ∆S both are +ve for spontaneous change and ∆H=+ve for endothermic reaction

The correct Option is "Spontaneous and endothermic"

Which of the following statement is correct for ${\rm{CsB}}{{\rm{r}}_3}$?

${\rm{CsB}}{{\rm{r}}_3} \to {\rm{C}}{{\rm{s}}^ + } + {\rm{Br}}_3^ - $

It contains ${\rm{C}}{{\rm{s}}^{3 + }}$ and ${\rm{B}}{{\rm{r}}^ - }$ ions

The correct Option is "It contains ${\rm{C}}{{\rm{s}}^ + }$ and ${\rm{Br}}_3^ - $ ions"

It contains ${\rm{C}}{{\rm{s}}^ + },{\rm{B}}{{\rm{r}}^ - }$ and lattice ${\rm{B}}{{\rm{r}}_2}$ molecule

Which of the following statement is correct?

An electric field is zero non-zero on the axis of hollow current carrying conductor. So, this statement is correct.

Electric field is zero on the surface of current carrying wire.

The correct Option is "Electric field is non-zero on the axis of hollow current carrying wire"

Surface integral of magnetic field for any closed surface is equal to $\;{\mu _0}$ times of total algebraic sum of current which are crossing through the closed surface

Which of the following statement is correct for a reaction $X + 2Y \to {\rm{Products}}?$

$ - \frac{{d\left[ X \right]}}{{dt}} = - \frac{1}{2}\frac{{d\left[ Y \right]}}{{dt}} = \frac{{d\left[ P \right]}}{{dt}}$

The rate of disappearance of $X = $ twice the rate of disappearance of $Y$

The rate of disappearance of $X = 1/2$ rate of appearance of products

The correct Option is "The rate of appearance of ${\rm{Products}} = 1/2$ the rate of disappearance of $Y$"

The rate of appearance of ${\rm{Products}} = 1/2$ the rate of disappearance of $X $

Which of the following statement is correct?

1. Acidity decreases with increase in number of carbon atoms in carboxylic acid. 2. Solubility of carboxylic acid decrease with increase in number of carbon atoms. Higher acids are insoluble in ${{\rm{H}}_2}{\rm{O}}$ 3. Boiling points of acids are higher than corresponding alcohols due to greater extent of hydrogen bonding. $\therefore $ (c) is correct answer.

Acidity increases with increase in carbon atoms in carboxylic acids.

Solubility of carboxylic acid increases with increase in carbon atoms.

The correct Option is "Boiling points of acids are higher than corresponding alcohols."

Which of the following feature is not related to facilitated diffusion?

Facilitated diffusion do not require ATP consumption.

Along the concentration gradient

The correct Option is "Require the energy in the form of ATP"

Which of the following gene clusters in bacteria is responsible for nitrogen fixtion?

Genes that direct the steps in nodulation of a legume by a specific rhizobial strain are called nod genes. Many nod genes from different rhizobia are highly conserved and are contained on large plasmids, which given then host specificity. In symplasmid of Rhizobium leguminosarum var. viciae, nod genes for nitrogen fixation, the nif genes. Number of nod genes are present in different species leading to nod factors, which induce root hair curling cell division, nodule formation.

The correct Option is "Nod, nif, fix"

As compared to the dicot root, monocotyledon root have

The anatomy of the monocot root is similar to the dicot root in many respects. It has epidermis, cortex, endodermis, pericycle, vascular bundles and pith. As compared to the dicot root, which have fewer xylem bundles, there are usually more than six (polyarch) xylem bundles in the monocot root. Pith is large and well-developed. Monocotyledonous roots do not undergo any secondary growth

The correct Option is "More xylem bundles"

When leaflets are even in number they are called …A… . When leaflets are odd in number called they are …B.. . Here A and B refers to:

When leaflet of a leaf are even in number called pari pinnate (tamarind) and when odd in number called imparipinnate.

The correct Option is "A-Paripinnate (tamarind); B-Imparipinnate (rose)"

A-Paripinnate (rose); B-Imparipinnate (tamarind)

A-Imparipinnate (tamarind); B-Paripinnate (rose)

A-Imparipinnate (rose); A-Paripinnate (tamarind)

Which of the following matches correctly?

Factor-II - Prothrombin Factor –III - Thromboplastin Factor –VIII - Antihaemophilic globulin Factor –XII - Hageman factor

The correct Option is "Factor –VIII - Antihaemophilic globulin"

Which plant hormone promotes seed dormancy, bud dormancy and causes stomatal closure?

Abscisic acid is a natural growth inhibitor. It promotes stomatal closure, i.e., it is a stress hormone and helps the plant to cope with adverse enviromental conditions especially drought. It also induces dormancy of seeds and buds. These seeds sprout only when ABA is overcome by GA.

The correct Option is "Abscisic acid"

Which is not related with N_2-fixation?

Pseudomonasspecies appears to be most important group of bacteria in denitrification in soils.

The correct Option is "Pseudomonas"

pH of thylakoid lumen during photosynthesis is

During the photosynthesis within chloroplast protons in the stroma decreases in number, while in lumen there is accumulation on protons. This create a proton gradient across the thylakoid membrane as well as a measurable decrease in pH (acidic) in the lumen