Mock Test

Exam: RRB Group D Subject: General Science Topic: Biology

Total Questions: 20

Q1. The discovery of 'Lucy' (Australopithecus afarensis) provided key evidence for which evolutionary development?

The development of complex language. The evolution of a large brain relative to body size. Early forms of habitual bipedalism. The mastery of projectile weapons.
Q2. A sequence of three nucleotides on mRNA that codes for a specific amino acid is called a:

Gene Codon Anticodon Intron
Q3. Which of the following is a result of overfishing?

Increased fish populations Healthier marine ecosystems Depletion of fish stocks Improved water quality
Q4. Which sense is most important for a fish to detect vibrations in the water?

Sight Smell Lateral line system Hearing
Q5. The process by which waste products are removed from the blood by the kidneys is known as:

Digestion Absorption Filtration and secretion Metabolism
Q6. When a neuron is at rest, there is a higher concentration of which ion inside the cell compared to outside?

Sodium (Na+) Chloride (Cl-) Potassium (K+) Calcium (Ca2+)
Q7. The light compensation point in a plant is defined as the light intensity at which:

Photosynthesis and respiration rates are equal. The rate of photosynthesis is maximal. Stomatal opening is at its minimum. Oxygen evolution ceases.
Q8. Graves' disease is an autoimmune disorder that affects which endocrine gland?

Adrenal gland Pituitary gland Thyroid gland Pancreas
Q9. Epistasis refers to a phenomenon where:

Multiple genes contribute to a single trait One gene masks or modifies the expression of another gene Alleles of the same gene are expressed equally Environmental factors influence gene expression
Q10. The finger-like projections that increase the surface area of the small intestine for absorption are called:

Villi Cilia Flagella Microvilli
Q11. A genetic disorder is caused by a mutation in a gene located on the Y chromosome. Which sex is most likely to be affected?

Females Males Both males and females equally Neither males nor females
Q12. The anticoagulant found naturally in the body, which binds to antithrombin III to potentiate its inhibitory effect on thrombin and Factor Xa, is:

Warfarin Heparin Aspirin Citalopram
Q13. Which microorganism is used in making curd from milk?

Yeast Fungi Bacteria Virus
Q14. The enzyme responsible for the hydrolysis of peptide bonds in proteins is:

Amylase Lipase Protease Nuclease
Q15. The process of guttation, the exudation of xylem sap from the edges of leaves, is most likely to occur under conditions of:

High transpiration and low soil water availability Low transpiration and high soil water availability High humidity and high wind speed Low light intensity and high temperature
Q16. In archaea, the lipid bilayer is often replaced by a monolayer composed of which unique type of molecule?

Glycerophospholipids Sphingolipids Isoprenoid chains linked by ether bonds Fatty acids esterified to glycerol
Q17. The final section of the large intestine, terminating at the anus, is the:

Colon Cecum Rectum Appendix
Q18. What type of tissue forms ligaments?

Bone tissue Muscle tissue Connective tissue Nervous tissue
Q19. A change in the DNA sequence is called a:

Recombination Mutation Crossing over Segregation
Q20. Which animal undergoes metamorphosis?

Cow Human Butterfly Dog

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