What is gene therapy? Illustrate using the example of adenosine deaminase (ADA) deficiency.
What are Cry proteins? Name an organism that produce it. How has man exploited this protein to his benefit?
If ΔA B C ~ ΔEDF and ΔABC is not similar to Δ DEF, then which of the following is not true?
(A) BC . EF = A C. FD (B) AB . EF = AC . DE
(C) BC . DE = AB . EF (D) BC . DE = AB . FD
The lengths of the diagonals of a rhombus are 16 cm and 12 cm. Then, the length of the side of the rhombus is
(A) 9 cm (B) 10 cm (C) 8 cm (D) 20 cm
D and E are respectively the points on the sides AB and AC of a triangle ABC such that AD = 2 cm, BD = 3 cm, BC = 7.5 cm and DE || BC. Then, length of DE (in cm) is
(A) 2.5 (B) 3 (C) 5 (D) 6
If in Fig , O is the point of intersection of two chords AB and CD such that OB = OD, then triangles OAC and ODB are
(A) equilateral but not similar
(B) isosceles but not similar
(C) equilateral and similar
(D) isosceles and similar
The students of a school decided to beautify the school on the Annual Day by fixing colourful flags on the straight passage of the school. They have 27 flags to be fixed at intervals of every 2 m. The flags are stored at the position of the middle most flag. Ruchi was given the responsibility of placing the flags. Ruchi kept her books where the flags were stored. She could carry only one flag at a time. How much distance did she cover in completing this job and returning back to collect her books? What is the maximum distance she travelled carrying a flag?
Jaspal Singh repays his total loan of Rs 118000 by paying every month starting with the first instalment of Rs 1000. If he increases the instalment by Rs 100 every month, what amount will be paid by him in the 30th instalment? What amount of loan does he still have to pay after the 30th instalment?
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