Welcome to biology afns test 6, specifically created for candidates preparing for the Armed Forces Nursing Services (AFNS) initial entrance test. This quiz covers important FSc Biology concepts and high-frequency MCQs to boost your exam readiness.
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#1. Which of the follow is common character shared by both prokaryotes and eukaryotes?
#2. The outer membrane of the nucleus: I. is continuous with the Endoplasmic reticulum II. does bear ribosomes
#3. Which component of the cell is needed to synthesize and build protein within cell?
#4. Mitochondria and chloroplast are: I. Semi-autonomous organelles II. Formed by division of pre-existing organelles and they contain DNA but lack protein synthesizing machinery. Which one of the following options is correct?
#5. How many of the following cell organelles are membranous? Endoplasmic reticulum, Nucleus, lysosomes, vacuoles, ribosomes, centrioles.
#6. The unit of phloem in which nucleus in absent
#7. The Cytoplasmic connection from cell to cell are known as;
#8. Organelle that found in both prokaryotic and eukaryotic cell;
#9. mRNA is formed in;
#10. Arrangement of coccus bacteria in chain is called:
#11. DNA of bacteria is present in:
#12. What is the primary function of the Calvin cycle?
#13. Where does exactly the NADP reductase enzyme located?
#14. Chloroplasts contain maximum of
#15. Generation of proton gradients across membranes occurs during
#16. Produces NADH
#17. Electrons from excited chlorophyll molecule of photosystem-II are accepted first by
#18. Match the terms in column-I with suitable terms in column-II (Glycosidic, Ester, Peptide, Phosphodiester)
#19. The covalent bond formed between two monosaccharides is called:
#20. The bond formed between glucose and fructose to form sucrose is ________ linkage:
#21. Carbohydrates are organic molecules and contain three elements:
#22. This theory suggest that the enzymes molecules are inactive form
#23. Which one are intermediates in respiration and photosynthesis both?
#24. __________ is the most abundant carbohydrate in nature:
#25. Which of the following is a keto sugar?
#26. The most common respiratory substance as a source of energy is:
#27. The simplest monosaccharide containing keto group is:
#28. Monosaccharides are major components of:
#29. Enterokinase is
#30. Which are all proteolytic enzymes
#31. What is common among amylase, renin and trypsin?
#32. End product of protein digestion is
#33. Which pair reaches the stomach totally undigested?
#34. Identify the correct set produced in the stomach, pepsin help in digestion casein
#35. Total number of canines in permanent dental set of human is
#36. Number of milk teeth found in humans is
#37. Anterior region of the stomach which joins the oesophagus through a sphincter is:
#38. Duodenum receives opening of:
#39. The final hydrolysis of disaccharides, dipeptides and tripeptides occurs in:
#40. Amylase converts starch and glycogen into:
#41. Villus wall is richly supplied with blood capillaries and lymph vessels called:
#42. The nutrients stored by bacterial granules may be:
#43. When DNA is exchanged via. Cytoplasmic bridges between two bacteria the process is called
#44. Site of respiration in bacteria is
#45. Pili in bacteria are used for
#46. The bacterium shown in diagram is (with flagella at both ends / tuft)
#47. Bacterial ribosomes lie in
#48. Tobacco mosaic virus/ virus was crystallized for the first time by
#49. Amphitrichous flagellation has
#50. Protein cover of virus is
#51. Common genetic material of bacteriophage is
#52. Genetic material of influenza virus is
#53. Important vectors in modern genetic engineering are_____
#54. Pilli are made of special protein called_____
#55. Square of four cocci is_____
#56. Syphilis is caused by:
#57. _____ is an invagination of cell membrane which helps in cell division.
#58. Cell wall structures of a cell of unknown origin was studied and was found to contain polysaccharide chain linked with short chains of amino acid. What do you think it can be?
#59. 18C unsaturated fatty acid with two double bonds is
#60. Phospholipids are
#61. Largest macromolecule in cell is
#62. Relationship between amino acid and protein is similar to one found between
#63. alpha-helix is stabilized by H-bonds between the
#64. All enzymes are
#65. The net gain of energy from one gram mole of glucose during aerobic respiration is:
#66. The cycle in which Acetyl-CoA is broken down in presence of oxygen is known as:
#67. The enzyme which converts glucose to glucose-6-phosphate is:
#68. The terminal cytochrome in respiratory chain is:
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BIOLOGY TEST 6
Welcome to biology afns test 6, specifically created for candidates preparing for the Armed Forces Nursing Services (AFNS) initial entrance test. This quiz covers important FSc Biology concepts and high-frequency MCQs to boost your exam readiness.
Key Topics Covered in Biology AFNS Test 6
To score high in the AFNS academic paper, focus on revising these important biological topics:
- Support and Movement: Skeletal system components, muscle contraction theories, and bone histology.
- Coordination and Control: Hormonal regulations, endocrine system MCQs, and nervous impulse pathways.
- Reproduction: Plant and animal reproductive strategies, embryonic development steps, and cellular division.
- Growth and Development: Morphogenesis, cellular differentiation, and growth regulators in plants.
Smart Strategies to Pass Biology AFNS Test 6
- Review FSc Textbooks: Go through 1st year and 2nd year FSc Biology definitions and key diagrams carefully.
- Analyze Missed Questions: Check your incorrect attempts at the end of the test to pinpoint topics that need further review.
- Pace Yourself: Practice completing questions within the time limit to build speed for the computer-based exam.
Useful Resources & Next Steps
- Next Quiz: Move forward to practice Biology AFNS Test 7.
- Main Hub: Return to All AFNS Biology Practice Quizzes to attempt tests in sequence.
- Official Information: For official entry test dates and eligibility criteria, visit the Join Pak Army Official Website.
General Biology Quiz 6: Microbiology, Pathogens & Immune Responses
Microbiology explores microscopic organisms, including bacteria, viruses, fungi, protozoa, and algae. While many microorganisms perform vital ecological roles such as decomposition and nitrogen fixation, pathogenic microbes cause infectious diseases in humans, animals, and plants. Biology Quiz 6 evaluates fundamental microbiological concepts and human immunological mechanisms.
🔬 Micro-Focus: Pay special attention to bacterial cell wall structures, viral replication cycles (lytic vs lysogenic), and primary vs secondary immune responses.
1. Bacterial Structure & Classification
Bacteria are single-celled prokaryotic organisms lacking a true nucleus and membrane-bound organelles. Their genetic material consists of a single circular DNA strand accompanied by small ringlets called plasmids. Bacteria reproduce asexually through binary fission.
Microbiologists classify bacteria based on their morphological shapes and Gram-staining characteristics:
- Cocci: Spherical-shaped bacteria (e.g., Streptococcus, Staphylococcus).
- Bacilli: Rod-shaped bacteria (e.g., Escherichia coli, Lactobacillus).
- Spirilla: Spiral or corkscrew-shaped bacteria (e.g., Spirillum).
- Gram-Positive vs. Gram-Negative: Gram-positive bacteria possess a thick peptidoglycan layer retaining crystal violet stain, whereas Gram-negative bacteria feature a thin peptidoglycan layer enclosed by an outer lipopolysaccharide membrane.
2. Virology: Structure and Replication of Viruses
Viruses occupy a unique gray area between living and non-living entities. Outside a host cell, they exist as inactive metabolic particles called virions. Inside a host cell, they hijack cellular machinery to replicate.
| Viral Feature | Biological Characteristics |
|---|---|
| Capsid | Protective protein coat enclosing viral genetic material (DNA or RNA). |
| Envelope | Lipid membrane derived from host cell membrane, studded with viral glycoproteins. |
| Lytic Cycle | Viral replication pathway resulting in rapid destruction and lysis of the host cell. |
| Lysogenic Cycle | Viral DNA integrates into host genome (prophage) and remains dormant before activation. |
3. Human Immune System & Defense Mechanisms
The human immune system defends the body against invading pathogens through layered defense mechanisms:
- Innate Immunity: Non-specific defense barriers present from birth, including physical skin barriers, mucous membranes, stomach acid, phagocytic white blood cells, and inflammatory responses.
- Adaptive Immunity: Target-specific defense mechanisms triggered by specific antigens. It involves B-lymphocytes (producing antibodies for humoral immunity) and T-lymphocytes (destroying infected cells via cell-mediated immunity).
4. Antibiotics, Vaccines, and Antimicrobial Resistance
Medical microbiology utilizes chemical and biological agents to manage infectious outbreaks:
- Antibiotics: Medications that inhibit bacterial growth or destroy bacterial cells (e.g., penicillins disrupting cell wall synthesis). Note that antibiotics are ineffective against viral infections like influenza.
- Vaccines: Biological preparations containing weakened or inactivated antigens that stimulate primary immune responses and generate immunological memory without causing active disease.
5. Preparation Strategy for Biology Quiz 6
To score high in Biology Quiz 6, review bacterial staining differences, viral replication phases, antibody structures, and principles of immunization.