Within the Science component, Biological Science and General Biology play a significant role. This area tests the examinee's understanding of fundamental biological concepts that are essential for teaching science at various educational levels. Topics typically include cell biology, genetics, evolution, ecology, and human anatomy. Mastery of these subjects is crucial for educators, as they form the foundation of science education in the Philippine curriculum.
A LET Reviewer specifically designed for General Education in Science, with a focus on Biological Science and General Biology, provides an invaluable resource for candidates. This reviewer aims to reinforce the core concepts and principles that are likely to appear on the exam. It includes comprehensive questions drill exercises that mirror the format and difficulty of the actual LET, enabling examinees to assess their readiness and identify areas that need further review.
In addition to covering the content, a well-rounded LET Reviewer also provides test-taking strategies, tips for managing time effectively during the exam, and techniques for answering multiple-choice questions accurately. Given the competitive nature of the LET and the high standards set by the Professional Regulation Commission (PRC), utilizing a specialized reviewer can significantly enhance an examinee's chances of passing the exam.
By focusing on Biological Science and General Biology within the General Education Science section, this LET Reviewer not only prepares candidates for the licensure exam but also equips them with the knowledge and confidence needed to excel as future educators in the Philippines.
PROFESSIONAL TEACHER REVIEWER
Welcome to our Professional Teacher Reviewer. In this session, you'll have the opportunity to test your understanding of key concepts in Biological Science and General Biology. The quiz consists of multiple-choice questions covering various topics. Pay close attention to each question and select the best answer. After completing the exam, check the video below for the answer key and explanations.
BIOLOGICAL SCIENCE AND GENERAL BIOLOGY
1. Which organelle is responsible for energy production in the cell?
A. Nucleus
B. Mitochondria
C. Ribosome
D. Golgi apparatus
2. What process occurs in the chloroplasts of plant cells?
A. Cellular respiration
B. Photosynthesis
C. Protein synthesis
D. Glycolysis
3. Which of the following best describes a gene?
A. A protein molecule
B. A segment of DNA that codes for a specific protein
C. A type of carbohydrate
D. A cellular organelle
4. What is the primary function of the ribosomes in a cell?
A. To synthesize lipids
B. To generate energy
C. To store genetic information
D. To synthesize proteins
5. In which phase of the cell cycle does DNA replication occur?
A. G1 phase
B. S phase
C. G2 phase
D. M phase
6. Which of the following is the correct sequence of the stages of mitosis?
A. Prophase, Metaphase, Anaphase, Telophase
B. Metaphase, Prophase, Anaphase, Telophase
C. Anaphase, Metaphase, Prophase, Telophase
D. Telophase, Anaphase, Metaphase, Prophase
7. What is the main difference between prokaryotic and eukaryotic cells?
A. Eukaryotic cells have a nucleus, while prokaryotic cells do not
B. Prokaryotic cells have a nucleus, while eukaryotic cells do not
C. Both cells lack a nucleus
D. Both cells have a nucleus
8. Which of the following best describes an enzyme?
A. A lipid that stores energy
B. A protein that speeds up chemical reactions
C. A carbohydrate that provides structural support
D. A nucleic acid that stores genetic information
9. Which process leads to the formation of gametes in animals?
A. Mitosis
B. Binary fission
C. Meiosis
D. Budding
10. Which molecule is the primary carrier of genetic information in cells?
A. RNA
B. Protein
C. DNA
D. ATP
11. What is the term for a change in the sequence of DNA in an organism?
A. Mutation
B. Transcription
C. Translation
D. Replication
12. Which of the following is an example of a vestigial structure in humans?
A. Appendix
B. Heart
C. Lungs
D. Kidney
13. Which part of the brain is responsible for regulating balance and coordination?
A. Cerebrum
B. Cerebellum
C. Brainstem
D. Hippocampus
14. What is the function of the alveoli in the human respiratory system?
A. To filter air
B. To exchange gases between the lungs and blood
C. To pump blood
D. To produce mucus
15. Which of the following describes the flow of energy in an ecosystem?
A. Energy is recycled within the ecosystem
B. Energy flows in a one-way direction from producers to consumers
C. Energy increases at each trophic level
D. Energy is destroyed after it is used
16. What is the main function of the large intestine in the human digestive system?
A. To break down proteins
B. To absorb water and electrolytes
C. To produce digestive enzymes
D. To store bile
17. Which of the following structures is responsible for the movement of chromosomes during cell division?
A. Centrioles
B. Lysosomes
C. Mitochondria
D. Ribosomes
18. What type of bond holds the two strands of a DNA molecule together?
A. Ionic bond
B. Hydrogen bond
C. Covalent bond
D. Peptide bond
19. Which of the following is a correct example of a homologous structure?
A. Wings of a butterfly and wings of a bat
B. Forelimbs of a cat and wings of a bat
C. Gills of a fish and lungs of a human
D. Eyes of a human and eyes of an octopus
20. Which organ system is primarily responsible for transporting nutrients, oxygen, and hormones throughout the body?
A. Digestive system
B. Respiratory system
C. Circulatory system
D. Nervous system
21. In which type of natural selection are extreme traits favored over intermediate traits?
A. Stabilizing selection
B. Directional selection
C. Disruptive selection
D. Balancing selection
22. What is the primary role of decomposers in an ecosystem?
A. To produce food
B. To recycle nutrients by breaking down dead organisms
C. To consume primary producers
D. To fix nitrogen in the soil
23. Which of the following best describes the function of tRNA during protein synthesis?
A. Carries the genetic code from DNA to the ribosome
B. Synthesizes amino acids
C. Brings amino acids to the ribosome for protein assembly
D. Catalyzes the formation of peptide bonds
24. What is the primary difference between aerobic and anaerobic respiration?
A. Aerobic respiration requires oxygen; anaerobic respiration does not
B. Anaerobic respiration requires oxygen; aerobic respiration does not
C. Aerobic respiration produces less energy than anaerobic respiration
D. Anaerobic respiration produces more energy than aerobic respiration
25. Which of the following is a characteristic of all living organisms?
A. The ability to move
B. The ability to reproduce
C. The ability to see
D. The ability to produce sound
26. What role do enzymes play in biological reactions?
A. They increase the activation energy required
B. They decrease the activation energy required
C. They change the products of the reaction
D. They are consumed in the reaction
27. Which part of the plant is primarily responsible for photosynthesis?
A. Roots
B. Stems
C. Leaves
D. Flowers
28. What is the basic unit of structure and function in living organisms?
A. Atom
B. Molecule
C. Cell
D. Tissue
29. Which type of RNA carries the genetic information from DNA to the ribosome?
A. mRNA (messenger RNA)
B. tRNA (transfer RNA)
C. rRNA (ribosomal RNA)
D. siRNA (small interfering RNA)
30. What is the significance of the cell membrane being selectively permeable?
A. It allows all substances to enter the cell
B. It allows the cell to maintain homeostasis by controlling what enters and exits
C. It prevents any substance from entering or leaving the cell
D. It only allows gases to pass through
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