Majorship LET Reviewer
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| LET Reviewer for Biological Science |
PRACTICE TEST IN BIOLOGICAL SCIENCE
1. Which of the following is not a characteristic of prokaryotic cells?
a) Lack of membrane-bound organelles
b) Presence of a cell wall
c) Presence of a nucleus
d) Presence of ribosomes
Answer: c) Presence of a nucleus
2. What is the main difference between mitosis and meiosis?
a) Mitosis results in two identical daughter cells, while meiosis results in four genetically different daughter cells.
b) Mitosis results in four genetically different daughter cells, while meiosis results in two identical daughter cells.
c) Mitosis is the process of cell division in somatic cells, while meiosis is the process of cell division in germ cells.
d) Mitosis results in haploid daughter cells, while meiosis results in diploid daughter cells.
Answer: a) Mitosis results in two identical daughter cells, while meiosis results in four genetically different daughter cells.
3. What is the process of converting atmospheric nitrogen into a usable form for plants and animals called?
a) Nitrification
b) Denitrification
c) Nitrogen fixation
d) Nitrogen assimilation
Answer: c) Nitrogen fixation
4. Which of the following is not a function of the liver?
a) Production of bile
b) Regulation of blood glucose levels
c) Production of insulin
d) Detoxification of harmful substances
Answer: c) Production of insulin
5. Which of the following is not a type of muscle tissue?
a) Skeletal muscle
b) Smooth muscle
c) Cardiac muscle
d) Adipose tissue
Answer: d) Adipose tissue
6. Which of the following is not a component of the scientific method?
a) Formulation of a hypothesis
b) Designing an experiment
c) Analyzing data
d) Confirmation bias
Answer: d) Confirmation bias
7. Which of the following is not a function of the lymphatic system?
a) Production of red blood cells
b) Transport of excess fluid from tissues to the circulatory system
c) Absorption of dietary fats
d) Defense against pathogens
Answer: a) Production of red blood cells
8. Which of the following is not a type of RNA?
a) Messenger RNA (mRNA)
b) Transfer RNA (tRNA)
c) Ribosomal RNA (rRNA)
d) Deoxyribonucleic acid (DNA)
Answer: d) Deoxyribonucleic acid (DNA)
9. Which of the following is not a principle of natural selection?
a) Variation exists within populations
b) Individuals with advantageous traits are more likely to survive and reproduce
c) Evolution occurs through the inheritance of acquired characteristics
d) Over time, populations can become adapted to their environment
Answer: c) Evolution occurs through the inheritance of acquired characteristics
10. Which of the following is not a component of the central nervous system?
a) Brain
b) Spinal cord
c) Peripheral nerves
d) Optic nerve
Answer: c) Peripheral nerves
11. Which of the following is not a type of ecological interaction between organisms?
a) Competition
b) Mutualism
c) Parasitism
d) Conformity
Answer: d) Conformity
12. What is the process by which cells convert glucose into ATP called?
a) Fermentation
b) Glycolysis
c) Krebs cycle
d) Electron transport chain
Answer: b) Glycolysis
13. Which of the following is not a type of white blood cell?
a) Neutrophil
b) Erythrocyte
c) Lymphocyte
d) Monocyte
Answer: b) Erythrocyte
14. Which of the following is a type of RNA molecule that plays a role in regulating gene expression by binding to messenger RNA (mRNA) and preventing its translation into protein?
a) Transfer RNA (tRNA)
b) Ribosomal RNA (rRNA)
c) MicroRNA (miRNA)
d) Small nuclear RNA (snRNA)
Answer: c) MicroRNA (miRNA)
15. What is the process by which prokaryotic cells transfer genetic material between each other called?
a) Mitosis
b) Meiosis
c) Conjugation
d) Transcription
Answer: c) Conjugation
16. Which of the following is a type of muscle fiber that is responsible for prolonged, sustained contractions and is found in postural muscles such as those in the back?
a) Type I (slow-twitch) fibers
b) Type IIa (fast-twitch oxidative) fibers
c) Type IIb (fast-twitch glycolytic) fibers
d) Type III (intermediate) fibers
Answer: a) Type I (slow-twitch) fibers
17. What is the process by which plants convert light energy into chemical energy in the form of glucose called?
a) Respiration
b) Photosynthesis
c) Fermentation
d) Oxidative phosphorylation
Answer: b) Photosynthesis
18. Which of the following is a type of cell junction that forms a barrier between cells and prevents the movement of substances between them?
a) Tight junctions
b) Gap junctions
c) Desmosomes
d) Plasmodesmata
Answer: a) Tight junctions
19. What is the process by which the DNA sequence of a gene is used to direct the synthesis of a protein called?
a) Transcription
b) Translation
c) Replication
d) Recombination
Answer: b) Translation
20. Which of the following is a type of symbiotic relationship in which one species benefits and the other is neither helped nor harmed?
a) Mutualism
b) Commensalism
c) Parasitism
d) Predation
Answer: b) Commensalism
21. Which of the following is a type of nitrogenous waste product that is excreted by birds and reptiles?
a) Ammonia
b) Urea
c) Uric acid
d) Creatinine
Answer: c) Uric acid
22. Which of the following is not a function of the respiratory system?
a) Exchange of gases between the air and blood
b) Regulation of blood pH
c) Production of hormones
d) Defense against pathogens
Answer: c) Production of hormones
23. Which of the following is a type of cell division that results in the production of four genetically diverse daughter cells and is used in the production of sperm and egg cells?
a) Mitosis
b) Meiosis
c) Binary fission
d) Budding
Answer: b) Meiosis
24. Which of the following is a type of membrane-bound organelle that is responsible for breaking down cellular waste products and foreign substances?
a) Lysosome
b) Mitochondrion
c) Chloroplast
d) Peroxisome
Answer: a) Lysosome
25. Which of the following is a type of ecological succession that occurs on a previously uninhabited substrate, such as a newly formed volcanic island or a glacier retreat?
a) Primary succession
b) Secondary succession
c) Pioneer succession
d) Climax succession
Answer: a) Primary succession
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