CELLMEMBRANE TOPIC

1. Who’s that
Who’s that
Organelle?
Organelle?

2. Covered with tiny, glistening jewels known as
ribosomes, it's responsible for holding the grand
symphony of protein synthesis. The folds in its
structure are like pages in a book, providing
ample space for ribosomes to work their magic.
Can you guess which organelle is speaking?

3. I am an organelle resides close to the nucleus and the
endoplasmic reticulum, tucked away like a bustling
sorting center. I house a crew of enzymes with talent
for modifying the products I handle, especially
proteins. Can you guess who I am?

4. This palace is known as the largest
organelle, and it holds the cell's most
precious treasure – all the genetic
information encoded in the form of
DNA. It's like the vault of the cell,
safeguarding the blueprints of life itself.
Can you guess which organelle is
speaking?

5. I am an organelle that is primarily
responsible for maintaining the shape
of plant cells, assisting in digestion and
waste removal, and even playing a role
in the plant's reaction to its
environment. Can you guess the
identity of this cell organelle?

6. What is the common structure found in
the organelles you have guessed?

7. Eukaryotic Cell is a Double Membrane System
Eukaryotic cells have a double membrane system because some of their
important parts, like the nucleus, mitochondria, and other organelles,
evolved from ancient cells that got trapped inside them. These ancient
cells had their own membranes, which became the double membranes
we see today.

8. Structures, Features, & Functions of

9. a. Explain the different structures and function found in the cell membrane;
b. Understand the significance of the structures to the biological processes it
involves; and
c. Observe the different cell types and their distinct structure. (Lab Activity)

10. The cell membrane, also called the
plasma membrane, is found in all
cells and separates the interior of the
cell from the outside environment.

13. Protects all the components of the cell from the
outside environment and allows separate activities
to occur inside and outside the cell.

15. Plasma membranes are selectively permeable (or semi-permeable),
meaning that only certain molecules can pass through them. This
way, the membrane can control the rate at which certain molecules
can enter and exit the cell.

17. Another important function of the membrane is to facilitate
communication and signaling between cells. The membrane also has
receptors that allow it to carry out certain tasks when molecules such as
hormones bind to those receptors.

19. Through Endocytosis, a cell can take in large quantities of molecules or
even whole bacteria from the extracellular fluid. Exocytosis is when the cell
releases these materials. The cell membrane plays an important role in
both of these processes.

21. 1. Kindly identify the one feature/function of cell membrane.
2. Why are some cellular organelles covered with cell membrane?

23. describes the cell membrane as a
tapestry of several types of molecules
(phospholipids, cholesterols, and
proteins) that are constantly moving.

25. Phospholipids have a head made
of phosphate and two tails made
of fatty acid.
• Hydrophilic (head) - attracted to
water or water loving
• Hydrophobic (tails) - they repel
water or water fearing

26. phospholipid bilayer
because of these properties phospholipids form two
layers known as a phospholipid bilayer
single
phospholipid
hydrophilic head
hydrophobic tail

28. Cholesterol is a component of
membranes, where it
functions to maintain
integrity, mechanical stability,
and fluidity of the membrane.

29. Cholesterol interacts with the fatty acid tails of
phospholipids to moderate the properties of the
membrane:
1. Reducing fluidity of the membrane
2. It makes the membrane less permeable
to very small water-soluble molecules
3. Prevent crystallization of the membrane
4. Anchoring the protein

30. Small nonpolar molecules can
easily diffuse across the cell
membrane. However, due to
the hydrophobic nature of the
lipids that make up cell
membranes, polar molecules
(such as water) and ions
cannot do so. Instead, they
diffuse across the membrane
through transport proteins.

31. a type of transport protein, acts
like a pore in the membrane that
lets water molecules or small
ions through the membrane
quickly.

32. A transport protein that is specific for an ion, molecule, or group of substances.
Carrier proteins "carry" the ion or molecule across the membrane by changing
shape after the binding of the ion or molecule.

34. How do the unique functions of cellular organelles mirror the
collaborative values of a Lasallian community, where each
individual's role contributes to the overall success and well-being of
the community?

35. a. Phospholipid: Hydrophilic
b. Cholesterol: Fluidity
c. Channel Protein: Small Molecules
d. Carrier Protein: Changing Shape