Staff Selection Commission Combined Graduate Level Exam
Question : Fermentation is a process of decomposition of an organic compound by :
Option 1: catalysts
Option 2: enzymes
Option 3: carbanions
Option 4: free radicals
Correct Answer: enzymes
Solution : The correct option is - enzymes.
An organic compound is broken down by enzymes during the fermentation process. Proteins known as enzymes catalyze biochemical reactions in living things. They convert complicated molecules into simpler ones.
Question : Which one of the following is a vestigial organ?
Option 1: Eye-brow
Option 2: Collar-bone
Option 3: Wisdom-teeth
Option 4: Nails
Correct Answer: Wisdom-teeth
Solution : The correct option is - Wisdom-teeth
Organs, tissues, or cells in a body that are no longer functional as they were in their prehistoric form are known as vestiges. The wisdom teeth, coccyx and vermiform appendix are examples of vestigial organs in humans.
Question : Directions: Priya points towards a man and says that he is her brother's paternal grandmother's only child. How is the man related to Priya?
Option 1: Brother
Option 2: Paternal grandfather
Option 3: Father
Option 4: Son
Correct Answer: Father
Solution : According to the above information, the family tree will be as follows –
Here, the quadrilateral represents the male, and the circular figure represents the female in the figure.
So, the man is Priya's father. Hence, the third option is correct.
Question : Directions: Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements. Statements: All toys are Legos. No block is Lego. Some puzzles are blocks. Conclusions: I. Some Legos are puzzles. II. No Lego is a block. III. Some toys are blocks.
Option 1: Only conclusion II follows
Option 2: Only conclusion I follows
Option 3: Only conclusion I and II follow
Option 4: Only conclusion I and III follow
Correct Answer: Only conclusion II follows
Solution : The possible Venn diagram according to the given statements is as follows –
Let's analyse the conclusions – Conclusion (I): Some Legos are puzzles – From the Venn diagram, it is evident that there is no direct relation between Legos and puzzles.
Question : During a school excursion, each student of the junior school was charged Rs. 325 and each student of the senior school was charged Rs. 400. If there were 80 students from junior school and the combined average amount charged per student was Rs. 352, how many students from senior school went for the excursion?
Option 1: 55
Option 2: 45
Option 3: 50
Option 4: 40
Correct Answer: 45
Solution : Let the number of seniors be $x$. The total amount of money charged from the juniors $=325 \times 80= 26000$ Total amount of money charged from all students $= 352 \times (80 + x)$ The total amount charged from the seniors $ =400 \times x$
Question : Ebraham Alkazi is an eminent personality in which one of the following area ?
Option 1: Heart surgery
Option 2: Civil aviation
Option 3: Theatre
Option 4: Painting
Correct Answer: Theatre
Solution : The correct option is - Theatre
Ebrahim Alkazi was a prominent figure in Indian theatre, renowned as a director and educator. He held the position of director at the National School of Drama in New Delhi from 1962 to 1977. Furthermore, he gained recognition as
Question : A person standing at a distance looks at a building having a height of 1000 metres. The angle between the top of the building and the ground is 30o. At what approximate distance (in metres) is the person standing away from the building?
Option 1: 1000
Option 2: 936
Option 3: 1732
Option 4: 1542
Correct Answer: 1732
Solution : Given: AB = Height of the building = 1000 metres Let the distance of the man from the building, BC be $x$. From $\triangle$ ABC, we get $\tan 30° = \frac{AB}{BC}$ ⇒ $\frac{1}{\sqrt{3}}= \frac{1000}{x}$ ⇒ $ x = 1000\sqrt{3}$ ⇒ $x$ = 1000 × 1.732
Question : Direction: Given equations are solved on the basis of a certain system. Find the correct answer for the unsolved equation on that basis.
2 + 4 + 6 = 48 and 3 + 2 + 8 = 48 , then 2 + 5 + 7 = ?
Option 1: 48
Option 2: 70
Option 3: 14
Option 4: 59
Correct Answer: 70
Solution : Here, in the given equations, we have–
2 + 4 + 6 = 48 ⇒ 2 x 4 x 6 = 48 3 + 2 + 8 = 48 ⇒ 3 x 2 x 8 = 48
Here, from the above two equations we can
Question : If $2s = a + b + c$, then the value of $s(s - c) + (s - a)(s - b)$ is:
Option 1: $ab$
Option 2: $abc$
Option 3: $0$
Option 4: $\frac{a+b+c}{2}$
Correct Answer: $ab$
Solution : Given: $2s = a + b + c$ ⇒ $s = \frac{a\:+\:b\:+\:c}{2}$ Now, $s(s - c) = (\frac{a\:+\:b\:+\:c}{2})(\frac{a\:+\:b\:+\:c}{2}-c)$ ⇒ $s(s - c) =(\frac{a\:+\:b\:+\:c}{2})(\frac{a\:+\:b\:-\:c}{2})$ Also, $(s - a)(s - b) = (\frac{a\:+\:b\:+\:c}{2}-a)(\frac{a\:+\:b\:+\:c}{2}-b)$ ⇒ $(s - a)(s - b) = (\frac{b\:+\:c\:-\:a}{2})(\frac{a\:+\:c\:-\:b}{2})$ So, $s(s - c) + (s
Question : Possible measures of the three angles of a triangle are:
Option 1: 33°, 42°, and 115°
Option 2: 40°, 70°, and 80°
Option 3: 30°, 60°, and 100°
Option 4: 50°, 60°, and 70°
Correct Answer: 50°, 60°, and 70°
Solution : The sum of the angles of a triangle is 180°. Here, 50° + 60° + 70° = 180° Hence, the correct answer is '50°, 60°, and 70°'.
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