RRB / Railways General Science Mock Test
259 free timed sets · 12,934 questions · 11,242 easy / 1,692 moderate / 0 hard · solutions for every question
All General Science sets
Sample General Science questions
1. What kind of structure do purines have?
- (A) single ring structure
- (B) triple ring structure
- (C) double ring structure
- (D) helical stucture
Show answer
(C) double ring structure. Figure 3.31 A nucleotide is made up of three components: a nitrogenous base, a pentose sugar, and one or more phosphate groups. Carbon residues in the pentose are numbered 1′ through 5′ (the prime distinguishes these residues from those in the base, which are numbered without using a prime notation). The base is attached to the 1′ position of the ribose, and the phosphate is attached to the 5′ position. When a polynucleotide is formed, the 5′ phosphate of the incoming nucleotide attaches to the 3′ hydroxyl group at the end of the growing chain. Two types of pentose are found in nucleotides, deoxyribose (found in DNA) and ribose (found in RNA). Deoxyribose is similar in structure to ribose, but it has an H instead of an OH at the 2′ position. Bases can be divided into two categories: purines and pyrimidines. Purines have a double ring structure, and pyrimidines have a single ring.
2. What are winds that blow over a limited area called?
- (A) Planetary Winds
- (B) trade winds
- (C) local winds
- (D) Periodic Winds
Show answer
(C) local winds. Local winds are winds that blow over a limited area. Local winds blow between small low and high pressure systems. They are influenced by local geography. Nearness to an ocean, lake, or mountain range can affect local winds. Some examples are found below. Local winds can affect the weather and climate of a region.
3. A student writes in a laboratory notebook: I placed a piece of iron in a beaker of water and the iron sank to the bottom of the beaker. What the student wrote in the laboratory notebook is an example of a(n)
- (A) observation
- (B) inference
- (C) prediction
- (D) hypothesis
Show answer
(A) observation. Correct answer: observation.
RRB / Railways General Science — FAQs
Is the RRB / Railways General Science mock test free?
Yes. All 259 General Science sets are free, need no signup, and give instant scores with a solution for every question.
How many General Science questions are there for RRB / Railways?
12,934 questions across 259 sets: 11,242 easy, 1,692 moderate and 0 hard.
Will I get the same questions again?
No. Each attempt draws a fresh random subset, shuffles the order and options, and prefers questions you have not seen on this device. The Surprise Set draws from the whole subject pool.
Can I choose difficulty and timer?
Yes — pick Easy, Moderate, Hard or Mixed, and choose no timer, 10 or 20 minutes, or the real exam pace.