biochem lab the cell

7/30/2019 Biochem Lab the Cell

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DATA AND ANSWER SHEET

Name Sibal, Deanne Devonney R. Remarks/Rating

Course, Yr. & Sec.ODP1A Instructor Dr. Maria Hedley A. Basco

Class Schedule 7:00-10:00 am, T-TH Group No. 7 Date June 30, 2012

EXPERIMENT 3

THE CELL

I. Draw and label the parts of the cell

II. Draw the Fluid Mosaic Model of the Cell Membrane. Label and give the function/s of each part.


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Parts and their function/s:

Carbohydrate Polymers may attach to parts of the membrane, formingGlycolipids when attach to PhospholipMolecules and Glycoproteinswhen they attach to proteins. Both Glycolipids and Glycoproteins can act asC

Receptor Sites. Hormones may bind to them, as may drugs, to instigate a response within the cell. They m

also be involved in Cell Signalling in the Immune System.

Intrinsic Proteins are Channel Proteins. These are Transport Proteins that allow the movement of molecu

that are normally too large or too Hydrophilic to pass through the membrane by forming a tube-li

structure that goes through the whole membrane.

Transport Proteins are Carrier Proteins. These use energy in the form ofATP to actively move substancacross the membrane. For example, ions in the soil are actively transported in the root hair cells of plants.

Enzymes and Coenzymes may be attached to part of the membrane in order to carry out MetaboReactions.Mitochondria have infoldings of the membrane (called Cristae) containing Enzymes which are par

responsible for Aerobic Respiration.

The Steroid Molecule Cholesterol gives the Plasma Membrane in some Eukaryotic Cells stability by reducithe fluidity and making the Bilayer more complete.

III. Complete the following table:Structure/Picture of Organelles Description Composition and Metabolic

Functions

Cytoplasm

Cytosol

cell material outside thenucleus but within the cell

membrane

contains structures calledorganelles

fluid portion of a cell'scytoplasm

lies outside the organellesand other insoluble

components of the

cytoplasm

gelatinous, semtransparent fluid that fi

most cells

metabolic pathwaincluding glycolysis

cell division

contains water, frproteins, and a variety

other substances

highly organized at tmolecular level

where a major part cellular metabolism takplace

proteins within cytosol plan important role

glycolysis, serve intracellular receptors, a

form part of ribosom

enabling protein synthesis


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DNA

Nucleus

Nucleolus

Mitochondria

Nucleic acid that makes upthe chromosomes

The genetic identity of thecell

Large spherical structuresurrounded by a doublemembrane

Composed of the nucleolus Where the chromosomes

(DNA) can be found

Round mass inside thenucleus

The core of the nucleus Where RNA can be found

Sacs with folded, doublemembranes

Power house of the cell

.Controls heredity acellular activities

Controls the geneactivities of the cell

Where ribosompreassemble

They release energy for cfunctions

Center of respiration of tcell

Produce the most enerrequired for cell


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Endoplasmic Reticulum

Smooth ER

Rough ER

Golgi Complex

Lysosome

It is not studded withribosomes and is associated

with smooth slippery fats.

It is studded with ribosomes

Flattened stacks ofmembrane-bound sacs

the digestive system in thecell

small membrane boundspheres

Associated with tproduction and metabolis

of fats and sterohormones

Involved in some proteproduction, protein foldin

quality control and dispat

function as a packagiplant, modifying vesic

from the Rough ER

It breaks down moleculinto their base componen

digestive enzymes. Th

demonstrates one of t

reasons for having all pa

of a c

compartmentalized; the ccouldnt use the destructi

enzymes if they weren

sealed off from the rest

the cell.


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Peroxisome

Plasma Membrane

Ribosome

RNA

Membranous sacscontaining oxidative

enzymes

Outer bilayer boundary ofcell

Composed of lipids andproteins

Float freely in thecytoplasm, and are alsobound to the endoplasmic

reticulum (ER)

Three types of nucleic acidinvolved in transcription

and translation of genetic

code

Destroy hydrogen peroxiin the cell

Protection Regulates passage

substance in and out t

cell

Where RNA is translatinto protein

mRNA carries genetic cofrom DNA

tRNA is involved in aminacid activation, rRNA involved in ribosom

structure

biochem lab the cell

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