2nd Test – 3rd Batch Mock Test SeriesBy abdulslambsn@gmail.com / July 23, 2025 2nd Test - 3rd Batch Mock Test Series Your Good Name: Your City: Email: 1. Which of the following bacteria lack a cell wall and are resistant to penicillin? Escherichia coli Mycoplasma pneumoniae Staphylococcus aureus Streptococcus Pyogenes None 2. Endotoxins are composed of: Endotoxins are composed of: Polysaccharides Lipopolysaccharides Peptidoglycan None 3. The difference between Gram-positive and Gram-negative bacteria is mainly due to: Ribosomes Cell membrane structure Peptidoglycan thickness Capsule composition None 4. Which stain is used to identify Mycobacterium tuberculosis? Gram stain Ziehl-Neelsen stain Endospore stain Negative stain None 5. Bacterial DNA replication occurs in: Mitochondria Nucleus Nucleoid Ribosomes None 6. Which of the following structures allow bacteria to attach to surfaces? Flagella Pili Spores Capsule None 7. Which bacterial structure is antigenic and used in vaccine production? Peptidoglycan Capsule Nucleoid Plasmid None 8. In Gram staining, the crystal violet stain is retained by: Gram-negative bacteria Gram-positive bacteria Mycoplasma All of the above None 9. Bacteria that grow only in absence of oxygen are called: Facultative anaerobes Obligate anaerobes Microaerophilic Aerobes None 10. The main function of bacterial endospores is: Movement Attachment Reproduction Survival under None 11. Conjugation in bacteria involves: Cell fusion Phage transfer Direct plasmid transfer via pili Mutation None 12. Which enzyme allows bacteria to hydrolyze hydrogen peroxide? Oxidase Catalase Coagulase Lysozyme None 13. The transfer of bacterial DNA via bacteriophage is called: Conjugation Transformation Transduction Translation None 14. Bacteria reproduce by: Budding Binary fission Mitosis Meiosis None 15. Antibiotic resistance genes are commonly located on: Ribosomes Mitochondria Plasmids Cell wall None 16. Lactobacillus in yogurt is an example of: Pathogen Decomposer Probiotic Saprophyte None 17. Treponema pallidum (causative agent of syphilis) is difficult to stain due to: Absence of DNA Spiral shape Thin cell wall and fastidious growth Capsule None 18. Which process involves uptake of naked DNA by a competent bacterial cell? Transformation Conjugation Transduction Recombination None 19. Which of the following is a vector quantity? Work Mass Velocity Distance None 20. Which of the following is a scalar quantity? Force Acceleration Displacement Speed None 21. The correct vector quantity among the following is: Power Pressure Weight Energy None 22. Which of the following pairs represents scalar quantities only? Mass and velocity Speed and distance Force and time Momentum and acceleration None 23. The angle between two vectors is 90°. Their resultant is: Sum of magnitudes Difference of magnitudes Vector sum using Pythagoras Zero None 24. Work is a scalar because it depends on: Direction Magnitude only Both Reference frame None 25. Vector quantities are added using: Arithmetic sum Algebraic sum Triangle/parallelogram rule Logarithms None 26. If two equal vectors act at 120°, the resultant is: Zero Equal to one vector Less than each vector √3 times one vector None 27. Which one of the following does not affect scalar quantities? Direction Magnitude Units Sign None 28. A vector can be fully specified by: Only magnitude Only direction Magnitude and direction Area None 29. Torque is a vector because it has: Units of force Direction of rotation Mass involved No magnitude None 30. Scalar product of two vectors is maximum when the angle between them is: 0° 90° C 180° 45° None 31. The vector sum of two equal forces acting at 120° is equal to: Twice the force Half the force Force × √3 Zero None 32. Displacement is different from distance because: It is scalar It is vector It has greater magnitude It is a path None 33. Acceleration is a vector because it involves: Force Mass Change in velocity with direction Energy None 34. Dot product gives a: Vector Scalar Matrix Tensor None 35. If direction of a vector is reversed, then its: Magnitude changes Direction and sign change It becomes scalar Unit changes None 1 out of 4 Thanks For Submitting Your Quiz !!