2.1.1 - cell structure

Question 1

formula of magnification

Answer 1

mag=image size/object size

Question 2

structure of the nucleus

Answer 2

contains gentic info in the form of chromosomes
contains the nucleolus
surrounded by the nuclear envolope that contains pores

Question 3

functions of the nucleus

Answer 3

controls cells activities (DNA has instructions to produce proteins)
synthesis of ribosomes - nucleolus makes ribosomal RNA
Substance can enter or leave the nucleus and cytoplasm via the nuclear pores

Question 4

structure of the cell membrane

Answer 4

mainly made of lipids and proteins

Question 5

functions of the cell membrane

Answer 5

controls movement of substances in and out of the cell
cell signalling - receptors can detect signals from other cells

Question 6

structure of the mitochondria

Answer 6

contains an enzyme rich liquid called the matrix
contain the own DNA (mtDNA) and ribosomes

Question 7

function of mitochondria

Answer 7

site of aerobis respiration and produces ATP

Question 8

where are ribosomes found

Answer 8

the cytoplasm or attached to the rer

Question 9

how many ribosomes does a eukaryotic cell contain

Answer 9

80S

Question 10

structue of the ribosome

Answer 10

made of proteins and rRNA
consist of a large and small subunit
not surrounded by a membrane

Question 11

funtion of ribosomes

Answer 11

site of protein synthesis and involved in the process of translation

Question 12

structure of the golgi

Answer 12

contains fluid filles membrane bound sacs called cisternae
contains smaller vesicles

Question 13

functions of the golgi

Answer 13

process and package lipids and proteins - carries out by the cisternae
store and transport lipids and proteins - done by vesicles
synthesise lysosomes

Question 14

structure of the rer

Answer 14

contains cisternae that is covered with ribosomes