4276: An air bubble in water will act like a
(a) convex mirror
(b) convex lens
(c) concave mirror
(d) concave lens
4277: Match List I (Scientists) with List II (Achievement) and select the correct answer using the codes given below the lists:
List I (Scientists)
A. Arber and Smith
B. Feldman
C. Mullis
D. Temin and Baltimore
List II (Achievement)
1. Developed transgenic plants with Agrobacterium T-DNA
2. Discovered endonucleares
3. Discovered reverse transcriptase
4. Discovered polymerase chain reaction
Codes:
A B C D
(a) 2 1 4 3
(b) 1 2 4 3
(c) 2 1 3 4
(d) 1 2 3 4
4278: Consider the following statements:
1. National Payments Corporation of India (NPCI) helps in promoting the financial inclusion in the country.
2. NPCI has launched RuPay, a card payment scheme.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
4279: Which one of the following is not a lagoon?
(a) Ashtamudi lake
(b) Chilka lake
(c) Periyar lake
(d) Pulicat lake
4280: The group of small pieces of rock - revolving round the sun between the orbits of Mars and Jupiter are called
(a) meteors
(b) comets
(c) meteorites
(d) asteroids