MCQ in Biological Science Part 3 | Licensure Exam for Teachers Review

This is the MCQ LET Reviewer, Multiple Choice Questions in Biological Science Part 3 as one coverage of Licensure Examinations for Teachers (LET). The exam is divided into two classifications. First is the elementary level exam which covers topics from General Education (GenEd) 40% and Professional Education (ProfEd) 60%. Second is the secondary level, which covers GenEd 20%, ProfEd 40% and area of specialization 40%. I assume you are looking for a reviewer that will help you achieve your goal to become a professional licensed teacher very soon. Yes, you are in the right place to make your dream come true. Make sure to familiarize each and every question to increase the chance of passing the Licensure Examinations for Teachers (LET).

Area of Specialization Coverage

Area of specialization refers to the majorship or the specific field that BSED graduates will handle:

• ENGLISH
• BIOLOGY
• CHEMISTRY
• VALUES
• MATH
• FILIPINO
• SOCIAL STUDIES
• MUSIC, ART, PHYSICAL EDUCATION, and HEALTH or MAPEH
• TECHNOLOGY and LIVELIHOOD EDUCATION
• AGRICULTURE AND FISHERY ARTS

Continue Practice Exam Test Questions Part 3 of the Series

⇐ MCQ in Biological Science Part 2 | Licensure Exam for Teachers Review

Choose the letter of the best answer in each question.

101. What organelle is responsible for packaging proteins for secretion?

A. Nucleus

B. Mitochondrion

C. Golgi apparatus

D. Lysosome

102. What biomolecule is primarily responsible for storing genetic information?

A. RNA

B. DNA

C. Protein

D. Lipid

103. Which plant hormone promotes cell elongation?

A. Cytokinin

B. Ethylene

C. Auxin

D. Gibberellin

104. Which of the following is NOT a greenhouse gas?

A. Methane

B. Nitrogen

C. Carbon dioxide

D. Water vapor

105. Which type of reproduction results in genetically identical offspring?

A. Sexual reproduction

B. Asexual reproduction

C. Crossbreeding

D. Fertilization

106. What do we call a structure that develops into a seed?

A. Ovary

B. Ovule

C. Pistil

D. Anther

107. In which phase of mitosis do chromosomes align at the cell’s equator?

A. Prophase

B. Metaphase

C. Anaphase

D. Telophase

108. Which natural process is responsible for the nitrogen in the atmosphere becoming usable by plants?

A. Photosynthesis

B. Nitrogen fixation

C. Respiration

D. Fermentation

109. What causes tides on Earth?

A. Earth’s rotation

B. Wind movement

C. Moon’s gravitational pull

D. Ocean currents

110. Which gas is most responsible for global warming?

A. Oxygen

B. Nitrogen

C. Carbon dioxide

D. Helium

111. Which layer of the Earth is responsible for its magnetic field?

A. Crust

B. Mantle

C. Outer core

D. Inner core

112. Which part of the plant is responsible for photosynthesis?

A. Roots

B. Stem

C. Leaves

D. Flowers

113. What structure protects the brain?

A. Ribs

B. Spine

C. Cranium

D. Sternum

114. Which of the following carries genetic information?

A. Protein

B. DNA

C. Carbohydrate

D. Lipid

115. Which of the following is an example of a non-renewable resource?

A. Solar energy

B. Wind energy

C. Coal

D. Biomass

116. Which part of the cell is known as the “powerhouse”?

A. Nucleus

B. Ribosome

C. Endoplasmic reticulum

D. Mitochondrion

117. What layer of the Earth is composed mainly of solid iron and nickel?

A. Mantle

B. Outer core

C. Inner core

D. Crust

118. What blood vessel carries oxygen-rich blood from the lungs to the heart?

A. Pulmonary artery

B. Pulmonary vein

C. Aorta

D. Vena cava

119. What causes tides on Earth?

A. Earth’s rotation

B. The Sun’s gravity

C. The Moon’s gravity

D. Ocean currents

120. What kind of energy transformation occurs in photosynthesis?

A. Chemical to mechanical

B. Solar to chemical

C. Mechanical to thermal

D. Chemical to electrical

121. Which of the following processes releases energy in the cell?

A. Photosynthesis

B. Mitosis

C. Cellular respiration

D. Osmosis

122. Which of the following is a non-renewable resource?

A. Solar energy

B. Wind energy

C. Coal

D. Biomass

123. Which of the following is not a part of the respiratory system?

A. Trachea

B. Bronchi

C. Esophagus

D. Alveoli

124. Which gas is the most abundant in Earth’s atmosphere?

A. Oxygen

B. Carbon dioxide

C. Nitrogen

D. Hydrogen

125. Which of the following best describes osmosis?

A. Movement of solute across membrane

B. Movement of water from low to high concentration

C. Movement of water from high to low concentration

D. Diffusion of gases

126. Which body system is responsible for transporting oxygen and nutrients throughout the body?

A. Nervous system

B. Circulatory system

C. Respiratory system

D. Muscular system

127. Which of the following are decomposers in an ecosystem?

A. Insects

B. Fungi and bacteria

C. Herbivores

D. Scavengers

128. What is the function of the mitochondria in a cell?

A. Protein synthesis

B. Photosynthesis

C. Energy production

D. Cell division

129. What is the main function of red blood cells?

A. Fight infection

B. Clot blood

C. Transport oxygen

D. Produce hormones

130. In which layer of the atmosphere does weather occur?

A. Stratosphere

B. Mesosphere

C. Thermosphere

D. Troposphere

131. Which of the following organelles is known as the “powerhouse” of the cell?

A. Nucleus

B. Mitochondrion

C. Ribosome

D. Endoplasmic reticulum

132. What is the scientific name for the voice box?

A. Pharynx

B. Trachea

C. Larynx

D. Bronchus

133. Which part of the eye controls the amount of light that enters?

A. Retina

B. Lens

C. Cornea

D. Iris

134. Which organ system is primarily responsible for hormone production and regulation?

A. Nervous system

B. Endocrine system

C. Circulatory system

D. Reproductive system

135. What is the main function of the large intestine?

A. Absorption of nutrients

B. Production of bile

C. Absorption of water and formation of feces

D. Digestion of proteins

136. Which of the following best describes a lunar eclipse?

A. The moon is between the Earth and the sun

B. The sun is between the moon and the Earth

C. The Earth is between the sun and the moon

D. The moon blocks the sun’s light from reaching the Earth

137. Which gas do green plants absorb from the atmosphere for photosynthesis?

A. Nitrogen

B. Carbon dioxide

C. Oxygen

D. Hydrogen

138. What is the function of ribosomes in a cell?

A. DNA replication

B. Transporting materials

C. Protein synthesis

D. Energy production

139. Which of the following is a vector-borne disease?

A. Tuberculosis

B. Malaria

C. Influenza

D. Pneumonia

140. Which phase of mitosis involves the alignment of chromosomes in the center of the cell?

A. Prophase

B. Metaphase

C. Anaphase

D. Telophase

141. Which of the following is a characteristic of asexual reproduction?

A. Involves two parents

B. Offspring are genetically identical to the parent

C. Requires fertilization

D. Involves gametes

142. Which of the following is a product of cellular respiration?

A. Oxygen

B. Glucose

C. Carbon dioxide

D. Water

143. What term is used for the process by which plants make their own food?

A. Digestion

B. Respiration

C. Photosynthesis

D. Transpiration

144. Which of the following structures in plants transports water from roots to leaves?

A. Phloem

B. Xylem

C. Stomata

D. Chloroplast

145. Which of the following best defines an ecosystem?

A. A group of similar species living in the same area

B. A community of organisms interacting with their physical environment

C. The energy flow in a food chain

D. The population of a species in a specific area

146. What is the role of DNA polymerase in DNA replication?

A. To unwind the DNA helix

B. To synthesize RNA primers

C. To synthesize the new DNA strand

D. To seal the DNA strands

147. Which type of bond involves the sharing of electron pairs between atoms?

A. Ionic bond

B. Covalent bond

C. Hydrogen bond

D. Metallic bond

148. What is the most abundant gas in Earth’s atmosphere?

A. Oxygen

B. Carbon dioxide

C. Nitrogen

D. Hydrogen

149. What structure in plants is responsible for the exchange of gases?

A. Roots

B. Stomata

C. Xylem

D. Phloem

150. Which of the following is true about the laws of thermodynamics?

A. Energy can be created or destroyed

B. Energy in a closed system remains constant

C. Energy is always lost as useful work

D. Energy is transferred without loss

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