unit 1 - biochemistry quiz

Question 1

the nucleus

Answer 1

directs the cels actiities, contains chromosomes made up of dna and proteins, only visible in dividing cells
chromatin is unfolded state of chromosomes in non divdin cells

Question 2

the cell membrane

Answer 2

boundary around the cell that selects whats allowed in and out
also known as the “lipid bylayer” because it is made up of two layers of phospholipids

Question 3

the endoplasmic reticulum

Answer 3

complex system of channels and sacs connected to the nuclear envelope
two types:
RER is studded with ribosomes and foloded proteins packages them in vesicles
SER synthesises lipids

Question 4

the nuclear envelmope/membrane

Answer 4

double membrane surround nucleus
nuclear pore complexes a group of proteins forming openings and controls what enters and exits

Question 5

question she could ask: three disaccharides
sucrose: glucose + fructose
maltose: glucose + glucose
lactose : glucose galactose

know alpha beta

Question 6

ribosomes

Answer 6

responsible for making proteins and syntesis of polypeptides in cytosol, it is composed of rna and proteins

Question 7

the golgi apparatus

Answer 7

acts as a post office for the cell
a stack of curved membrane sacs that packages, proccesses, sorts, and distrubted proteins, lipids, etc.
whe nmodifies substances are ready for transport, peaces pinch to form vesicles and these vesicles carry the substance to the cell membrane

Question 8

vesicles

Answer 8

membrane endosed sac used for transport
forms from pinching of cel land organelle membranes
fuse with membranes to release contents

Question 9

the endomembrane system

Answer 9

consists of nuclear envelope, er, golgiapparatus, vesicles, and cell membranes
all act to synthesis, modify and transport cell products such as proteins

Question 10

vacuoles

Answer 10

central vesicle in plant cells, store waater, sugars, amino acids, macromolecules

Question 11

peroxisomes

Answer 11

break down excess fatty acids, hydrogen peroxide, and alcohol
synthesise cholestrol and bile acids

Question 12

mitochondria

Answer 12

power house of the cell, provides cel lwith energy by breaking down high energy to useble energy atp
cellular respiration
contain own dna for some of their proteins

Question 13

choloroplasts

Answer 13

photosynthesis organisms
contain chlorophyll
location of photosynthesis
contain own dna

Question 14

cytoskeleton

Answer 14

a network of protein fibres that extent throughout cytosol, providing structure, support, shaep and mobility.movement