Class 11 Biology: Passive Transport Lab

Grade 11 Biology • Cell Transport / Transpor Sel

Student Worksheet (LKPD): Passive Transport Lab

Complete all 3 practical stations (Simple Diffusion, Facilitated Diffusion, and Osmosis). Input your findings below. Your score and model answer key will be evaluated automatically upon submission!
(Lengkapi 3 stasiun praktikum. Skor dan kunci jawaban pembahasan akan langsung ditampilkan secara otomatis setelah tombol submit ditekan.)

Practical Timer / Stopwatch
00:00.0

Identity / Identitas Kelompok

PART A Simple Diffusion / Difusi Sederhana

Procedure / Prosedur: Fill Beaker A with cold water (~10°C) and Beaker B with warm water (~50°C). Add 1 drop of coloring to each simultaneously. Record time to reach dynamic equilibrium.

Beaker Condition / Suhu Water Time to Equilibrium (seconds / detik) Visual Description / Deskripsi Visual
Beaker A Cold Water / Air Dingin (~10°C)
Beaker B Warm Water / Air Hangat (~50°C)

PART B Facilitated Diffusion / Difusi Terfasilitasi

Model Brief: Test particle movement through intact phospholipid barrier vs. slotted channel protein barrier. Roll 10 marbles toward each barrier.

Barrier Type / Jenis Penghalang Biological Representative / Analogi Membran Passed / Lolos (Out of 10) Ease of Movement / Kemudahan
Solid Barrier / Tanpa Celah Pure Lipid Bilayer (Hydrophobic Core)
Slotted Barrier / Berelah Protein Protein Channel / Saluran Protein

PART C Osmosis (Potato Strip Experiment / Percobaan Kentang)

Auto-calculated Delta L (ΔL)

Procedure / Prosedur: Submerge potato strips (Initial $L_0 = 4.0\text{ cm}$) into 3 solutions for 30 minutes. Record final length ($L_1$) and texture.

Beaker Solution / Larutan Initial $L_0$ (cm) Final $L_1$ (cm) ΔL Change (cm) Texture / Tekstur Firmness
Beaker 1: Distilled Water (Aquadest) +0.0 cm
Beaker 2: 10% NaCl Solution (Garam 10%) -0.0 cm
Beaker 3: 20% NaCl Solution (Garam 20%) -0.0 cm

Analysis & Discussion Questions / Pertanyaan Diskusi

Characteristic Simple Diffusion Facilitated Diffusion Osmosis
Molecules Moved
Requires Protein?
Direction Gradient
ATP Energy Required?

Overall Conclusion / Kesimpulan Praktikum

Check all input fields before submitting. / Pastikan semua tabel & pertanyaan terisi.