About ______ the first cellular forms of life appeared on earth.

Match List I with List II

LIST I	LIST II
A. Dominant trait of pod colour in garden pea	I. Polygenic traits
B. The physical association of two genes on a chromosome	II. Pleiotropy
C. The traits generally controlled by three or more genes	III. Yellow
D. When a single gene exhibit multiple phenotypic expression	IV. Linkage
	V. Green

Choose the correct answer from the options given below:

Match List - I with List - II.

List - I	List - II
(A) Australian marsupials	(I) Homologous organs
(B) Wings of butterfly and wings of a bird	(II) Natural selection
(C) Industrial melanism	(III) Adaptive radiation
(D) Forelimbs of Horse and Bat	(IV) Analogous organs

Which of the following is not a benefit of genetically modified plants/crops?

Biofertilisers are the organisms that enrich the nutrient quality of the soil.
Which of the following is not a source of biofertiliser?

Read the following paragraph and answer the given questions:
In order to link the alien DNA, the vector needs to have very few, preferably single, recognition sites for the commonly used restriction enzymes. Presence of more than one recognition site in the vector will generate several fragments, which will complicate the gene cloning. In order to link the alien DNA, the vector needs to have very few, preferably single, recognition sites for the commonly used restriction enzymes. Presence of more than one recognition sites within the vector will generate several fragments, which will complicate the gene cloning. The ligation of alien DNA is carried out at a restriction site present in one of the two antibiotic resistance genes. The recombinant plasmids will lose tetracycline resistance due to insertion of foreign DNA but can still be selected out from non-recombinant ones by plating the transformants on tetracycline containing medium.
The recombinants will grow in ampicillin containing medium but not on that containing tetracycline. But, non- recombinants will grow on the medium containing both the antibiotics. In this case, one antibiotic resistance gene helps in selecting the transformants, whereas the other antibiotic resistance gene gets 'inactivated due to insertion' of alien DNA, and helps in selection of recombinants. Origin of replication (ori) is a sequence from where replication starts and any piece of DNA when linked to this sequence can be made to replicate within the host cells. This sequence is also responsible for controlling the copy number of the linked DNA. So, if one wants to recover many copies of the target DNA it should be cloned in a vector whose origin support has high copy number.
In pBR322 'rop' codes for -

The chromosomal disorders are caused due to absence, excess or abnormal arrangement of one or more chromosomes. Failure of segregation of chromatids during cell division results in the gain or loss of chromosome(s), called aneuploidy.
Which of the following statements are correct with respect to the humans suffering from the disorder?
(A) One in every 800 live births shows this karyotype
(B) The affected individual has 45 chromosomes.
(C) Non-disjunction of chromosomes at the time of gamete formation causes this disorder.
(D) In this disorder, individual has 45 autosomes
Choose the correct answer from the options given below:

The electric field in a region is given by \( E = \frac{E_0 x}{b} \). Find the charge contained in the cubical volume bounded by the \( x = 0, x = a, y = 0, y = a \) and \( z = 0, z = a \). Take \( E_0 = 6 \times 10^3 \text{ N/C}, a = 1 \text{ cm} \) and \( b = 2 \text{ cm} \)

Products not possible from given reaction is :
\(R - CH _2- C ( O )- CH _2- R ^{\prime} \xrightarrow{[ O ]}\)
(A) RCOOH
(B) \(R ^{\prime} CH _2 COOH\)
(C) \(R - CH _2- COOH\)
(D) \(R ^{\prime}- C ( O )- OCH _3\)
Choose the correct answer from the options given below:

The function \(f: R \rightarrow R\) defined as \(f(x)=x^2+2 x\) is

Arrange the given steps of menstrual cycle in correct sequence.
(A) Menstruation
(B) Luteal phase
(C) Follicular phase
(D) Next cycle starts
Choose the correct answer from the options given below:

Which of the following statements are true?
(A) The potential energy for a system of two negative point charges is negative
(B) Electrostatic force is a conservative force
(C) Negative potential energy between two charges implies that the force between them is repulsive
(D) Electrostatic potential energy is a scalar quantity
Choose the correct answer from the options given below:

An alpha particle is moving in a magnetic field \( (3\hat{i} + 2\hat{j}) \text{ T} \) with the velocity \( (7 \times 10^5 \hat{i}) \text{ m/s} \). The magnetic force acting on the particle is: