2024 A LEVEL BIOLOGY MOCK
genetic material - codes for viral protein
capsid - protects the genetic material
attachment protein - binds to complementary receptors on cell - questions and
answersgive three structural features found in all virus particles and describe the
function of one of these features
acellular - no cell-surface membrane
non-living - have no metabolic reactions and cannot independently
move/respire/replicate - questions and answersexplain why viruses are described as
acellular and non-living
-do not have bacterial structures/enzymes
-do not have metabolic processes
-do not have a cell wall - questions and answersgive one reason why antibiotics are not
effective against viruses
-tracheloe wall one cell think so short diffusion pathway
-tracheoles supply tissues, so diffusion directly into cells
-tracheoles are highly branched, so large surface are for rapid diffusion - questions and
answersexplain the importance of one adaptation of the gas exchange surface in the
tracheal system of an insect
-allows unbroken water column
-cohesion from H bonds between all water molecules
-evaporation creates tension in column - questions and answersexplain the importance
of the xylem being kept open as a continuous tube
-modify/transports/packages proteins
-modify/package/transport lipids
-forms/releases lysosomes - questions and answersdescribe two functions of the golgi
apparatus in a eukaryotic cell
-reduced surface are
-decreases water potential in ileum
-so water moves out of cells into ileum by osmosis - questions and answersexplain why
the damage to the cells in the lining the ileum (with microvilli) reduces the absorption of
the products of digestions and why this reduces absorption of water
genetic material - codes for viral protein
capsid - protects the genetic material
attachment protein - binds to complementary receptors on cell - questions and
answersgive three structural features found in all virus particles and describe the
function of one of these features
acellular - no cell-surface membrane
non-living - have no metabolic reactions and cannot independently
move/respire/replicate - questions and answersexplain why viruses are described as
acellular and non-living
-do not have bacterial structures/enzymes
-do not have metabolic processes
-do not have a cell wall - questions and answersgive one reason why antibiotics are not
effective against viruses
-tracheloe wall one cell think so short diffusion pathway
-tracheoles supply tissues, so diffusion directly into cells
-tracheoles are highly branched, so large surface are for rapid diffusion - questions and
answersexplain the importance of one adaptation of the gas exchange surface in the
tracheal system of an insect
-allows unbroken water column
-cohesion from H bonds between all water molecules
-evaporation creates tension in column - questions and answersexplain the importance
of the xylem being kept open as a continuous tube
-modify/transports/packages proteins
-modify/package/transport lipids
-forms/releases lysosomes - questions and answersdescribe two functions of the golgi
apparatus in a eukaryotic cell
-reduced surface are
-decreases water potential in ileum
-so water moves out of cells into ileum by osmosis - questions and answersexplain why
the damage to the cells in the lining the ileum (with microvilli) reduces the absorption of
the products of digestions and why this reduces absorption of water
