Past paper questions Flashcards
What is the bond found between the monomers in both starch and cellulose?
Glycosidic bond
Identify the types of reactions at A & B
Condensation and hydrolysis
Name the bond labelled X
Peptide bond
Give one example of a globular protein?
Enzymes
Give a structural difference in normal and disease causing prions?
It contains a secondary structure and is formed of beta pleated sheets.
State one way someone can get disease causing prions?
It can be caused by a mutation in the gene and may be passed from parent to offspring
It can appear spontaneously and will change normal prions into disease causing prions
It can be passed from consuming contaminated meat.
What are the building blocks of proteins?
What are the bonds that attach them?
Amino acids
Peptide bonds
What are the bonds labelled A&B (pg 31)
Hydrogen bonds
Phosphodiester
What structures are in both plant and animal cells?
What are in just plant cells?
What are just in animal cells?
Cytoplasm, endoplasmic reticulum, mitochondria
Vacuole and cell wall
Glycogen granules
What are the finger like extensions?
What forms secretory vesicles?
What allows direct movement of substances between adjacent plant cell walls?
Microvilli
Golgi apparatus
Plasmodesmata
Name structures A-D (PG 72)
Vesicle
Endoplasmic reticulum
Mitochondria
Cristae
Pg 73 in past papers?
Mitochondria Nucleus Microvilli Smooth endoplasmic reticulum Lamella
Why is the cell surface known as having a ‘fluid mosaic’ structure?
This is because phospholipids move from side to side and proteins are irregularly arranged throughout the membrane
What is prophase 1
Chromosomes condense and become visible as two chromatids
The nuclear membrane is broken, nucleolus disappears and spindle fibres form
Homologous pairs form bivalent bonds
What is metaphase 1
Homologous pairs line up on the equator of the cell
Spindle fibres attach to the centromeres of each chromosome