IIT JAM Biotechnology Mock Test 5 - IIT JAM MCQ

Since π radian  = 180 degree

⇒ 1 radian = 180/π degree

⇒ 1 radian = 180/3.14 degree

⇒ 1 radian = 57.29 degree (aprox) = (57.29)°
Thus. 1 radian > 1°
Radian measure is equivalent to real number
Therefore 1 > 1°
That is, 1° < 1

High atmospheric humidity means large amount of water vapours are present in the surrounding atmosphere. There would be no more space in the atmosphere to hold more water vapours. So rate of transpiration decreases in such environment. 

The movement of the leaves of the sensitive plant Mimosa pudica is due to seismonasty. This is a response to touch or vibration.

The technique of in situ hybridization is used to locate the chromosomal location of a specific DNA (or RNA) probe. The theory is the same as for southern hybridization, except that the DNA to which the probe will hybridize is the actual chromosome. The probe is labelled with a fluorescent probe.

In nature the sex which contributes more energy in reproduction will be the sex which becomes choosy during reproduction. In option (b) the number of males in population is less as compared to females. Under female biased conditions males have to contribute more energy in reproduction. So, reverse sexual diamorphism takes place in such a population.

1 (black): 2 (speckled): 1 (white)
∴ 25% black: 50% speckled : 25% white

Number of students playiny neither cricket nor tenis is

Guard cells are not joined to each other by plasmodesmata.

Etiolation is characterised by long, weak stems, smaller leaves due to longer internodes and pale yellow leaves. It is caused due to plants growing in the absence of light.

Ascent of sap is the mechanism by which water travels in a plant against gravity. Assimilation means the process of absorption and digestion of nutrients by an organism. Somatic embryos are also known as artificial seeds. Asphyxiants destroy pests by causing them respiratory distress.

In the conventional organic extraction method, cells are lysed and cell debris is usually removed by centrifugation. Then proteins are denatured using a protease after RNAse treatment used for removal of RNA and precipitated using organic solvents such as phenol or 1:1 mixture of phenol and chloroform and the protein precipitate is removed by centrifugation. Purified DNA is usually recovered by precipitation using ethanol or isopropanol.

Separation of proteins in the case of isoelectric focusing is based on  pH. The IEF gels have pH gradients which helps in separation of proteins. The isoelectric point (pI), is the pH at which a particular molecule or surface carries no net electrical charge. The pI value can affect the solubility of a molecule at a given pH. Such molecules have minimum solubility in water or salt solutions at the pH which corresponds to their pI and often precipitate out of solution. Biological amphoteric molecules such as proteins contain both acidic and basic functional groups. At a pH below their pI, proteins carry a net positive charge, above their pI they carry a net negative charge. Proteins can thus be separated according to their isoelectric point (overall charge) on a polyacrylamide gel using IEF.

The stick insect (as its name suggests) is an insect that looks like a twig on a branch, bush or tree. This unique identity means that stick insects can be extremely difficult for predators to spot.

Tropical rain forests produce around 9000 Kcal per meter² per year. Tropical rainforests have high primary productivity because of availability of plenty of solar light and water. Tropical rainforests have primary productivity that equals with Swamp, Marshes, Esuaries. After coral reef, algal beds temperature forests have highest primary productivity respectively. Least primary productivity is found in cold and hot deserts including Tundra.

The sex of  Drosophila is given as X : A chromosome ratio. A ratio of 0.33 gives a Metamale. 

This is an example of duplicate recessive epistasis where the ratio of F2 generation is 9 : 7 instead of 9 : 3 : 3 : 1.

Rieske proteins are iron-sulphur components of cytochrome bc complexes and cytochrome b6f complexes.

Total pressure at time t 

Pressure of SO₂Cl₂ at time t

First order rate constant

For g-orbitals l = 4

Always oxidation occurs at anode and reduction occurs at cathode whatever the type of cell

Tiiclimc crystal.
All axial length are unequal → a ≠ b ≠ c
All mterfacial angles are unequal → α ≠ β ≠ γ  ≠  90°.