Botany and Zoology
Which plant cell wall component provides tensile strength due to its β(1→4) linked glucose polymer structure, and is also the most abundant organic polymer on Earth?
A. Lignin
B. Cellulose
C. Chitin
D. Pectin
B. Cellulose
Absorbance becomes unreliable when absorbance values exceed:
0.1
1.0
2.0
4.0
C. 2.0
What evolutionary process accounts for a trait, like feathers in birds, that initially evolved to serve a primary purpose but was later successfully utilized for a completely new and advantageous function?
A. Adaptive radiation
B. Genetic drift
C. Exaptation
D. Convergent evolution
Exaptation
This method amplifies specific DNA sequences using primers, heat, and a polymerase
PCR (Polymerase Chain Reaction)
Which actress plays the character of Madame Morrible in the movie adaptation of the musical “Wicked”?
Michelle Yeoh
The Calvin Cycle occurs in the stroma of chloroplasts. Which of the following best describes the role of the stroma in photosynthesis?
A. It houses the light-dependent reactions and produces ATP and NADPH.
B. It contains the chlorophyll pigments that absorb light energy.
C. It provides the enzymatic environment for carbon fixation using ATP and NADPH.
D. It stores water and mineral ions for photosynthesis.
C. It provides the enzymatic environment for carbon fixation using ATP and NADPH.
This type of chromatography separates proteins and other macromolecules based on their size or molecular weight using a porous gel matrix.
A. Ion-exchange chromatography
B. Affinity chromatography
C. Gel filtration chromatography
D. Reverse-phase chromatography
C. Gel filtration chromatography
During which months does the southwest monsoon occur in the Philippines?
Phosphorylation cascades in signal transduction are commonly mediated by these enzymes.
Protein kinases
How many graduates received the B.S. Zoology degree between 1936 and 1948?
6
In the Phylum Nematoda, what do you call the cellular layer beneath the cuticle that secretes new cuticle layers?
Hypodermis
What coenzyme is commonly involved in catabolic redox reactions involving C-O bonds?
A. FAD / FADH₂
B. Coenzyme Q
C. NAD⁺ / NADH
D. Biotin
C. NAD⁺ / NADH
A scientist is revising a genus where the original species description is vague, and all the specimens cited by the original author have been verified as either lost, disintegrated, or otherwise non-existent. To stabilize the nomenclature of this species, what kind of type specimen must the scientist designate to serve as a substitute for the missing name-bearing material?
A. Holotype
B. Lectotype
C. Syntype
D. Neotype
D. Neotype
This transcription factor binds to the TATA box to help initiate transcription.
TATA-binding protein (TBP)
Katseye is often described as a “global girl group” for their diverse set of members coming from the United States, Philippines, South Korea, and _____.
Switzerland
Crabs, Lobsters, and Shrimps belong to what class?
Malacostraca
What is the complete Henderson-Hasselbalch equation?
pH = pKa + log([A⁻]/[HA])?
A farm field with severely depleted topsoil and low microbial diversity receives a large application of potassium nitrate (KNO3) fertilizer. If these soil conditions immediately inhibit one step of the nitrogen cycle more than others, which process is it?
A. Nitrogen fixation
B. Nitrification
C. Ammonification
D. Denitrification
D. Denitrification
This enzyme uses ATP to maintain the acidic environment inside lysosomes.
Last November 24, 2025, senator Imee Marcos posted a statement addressing his brother Bongbong, saying: “Bongbong, ako ‘to, _______________. Patunayan mong mali ako. Gusto kong mali ako.”
“kung anu-ano na nakikita mo ading”
How many plants mentioned in the traditional Filipino folk song “Bahay Kubo” have a modified root system?
2 (Singkamas and Labanos)
The Haldane Effect refers to the change in hemoglobin’s affinity for carbon dioxide due to the presence of oxygen. What does this effect describe?
A. Hemoglobin’s increased affinity for oxygen at high CO₂ levels
B. The cooperative binding of oxygen to hemoglobin
C. Hemoglobin’s decreased affinity for CO₂ when oxygen is bound
D. The shift in hemoglobin’s oxygen-binding curve with pH changes
C. Hemoglobin’s decreased affinity for CO₂ when oxygen is bound
With over 250,000 species alive today, angiosperms form a vast plant group. What is the genus of the little-known shrub from New Caledonia that is the sister taxon to all other angiosperms?
Amborella
These vesicles are responsible for moving proteins forward through the secretory pathway.
COPII vesicles
What is the full name of the Filipino and Thomasian pole vaulter who recently reached world No. 5 in men’s pole vault last August 12?
Ernest John Uy Obiena