Biology B2 AQA
Are human cells the same as other animal cells? - ANS-Most human cells are like maximum
different animal cells and incorporate a nucleus, cytoplasm, membrane, mitochondria and
ribosomes.
Are there any problems related to embryo screening? - ANS-Some humans in affected
Huntingdon's families take the check to decide whether or not to marry or have a circle of
relatives. Others prefer not to understand.
Some couples have their embryos examined at some stage in pregnancy after which decide
to maintain or abort.
Other couples have their embryos screened before they may be implanted by IVF.
Describe the structure of a yeast cellular. - ANS-Each cell has a nucleus, cytoplasm and a
membrane surrounded with the aid of a cell wall.
Does the size of the pattern matter? - ANS-Yes. If you do a ten quadrat sample, it will now
not be as reproducible or as valid as in case you perform one hundred quadrats.
Expain the structure and feature of the mitochondria. - ANS-Structures within the cytoplasm
wherein oxygen is used and maximum of the electricity is released throughout respiratory.
Explain the function of ribosomes - ANS-Where protein synthesis takes location. All the
proteins wanted inside the cellular are made here.
Explain the function of the cellular membrane. - ANS-Controls the passage of materials into
and out of the cellular.
Explain the feature of the nucleus in cells - ANS-Controls all of the sports inside the cell. It
contains the genes at the chromosomes.
Explain the shape and feature of the cytoplasm - ANS-A liquid gel in which maximum of the
chemical reactions wanted for lifestyles take place.
Give three matters which could affect the charge of diffusion. - ANS-1).The more the
distinction in awareness, the quicker the rate of diffusion. 2) an increase in temperature
approach the particles in a fuel or answer flow extra speedy so diffusion hastens. 3) An
growth in the floor region of a cellular membrane manner that diffusion can take location
greater quick.
Give four causes of extinction in a species of living organisms. - ANS-At times of extreme
warmness in the world, ice ages, large volcanic eruptions and collision of asteroids with
earth.
Give four reasons in opposition to the use of embryonic stem cells. - ANS-1) They are still
experimental and there may be a hazard that they'll motive in addition issues which include
cancer
2) All embryos have the capacity to become infants so it is inaccurate to experiment on
them.
3) Embryos cannot provide permission, so it's miles unethical.
4) It is taking a long time to expand any remedy that works - so the cash will be higher spent
on new pills.
Give five motives to be in favour of the usage of embryonic stem cells. - ANS-1) They deliver
one of the excellent chances of finding remedies for exclusive and often extreme situations.
, 2) The embyos used are normally spare ones from infertility treatment and could be
destroyed besides.
3) Embryos are being constituted of adult cells in use in research - they would by no means
be babies.
4) It can be possible to apply embryonic stem cells from the umbillical cords of new child
infants.
5) Emryonic stem cells might be used to grow new tissues and organs for transplants.
Give an example of plant cells that do not have Chloroplastsand give an explanation for why
they have got none. - ANS-Root cells do no longer have chloroplasts because they're
underground and do not photosynthesise.
Give examples of plant organs. - ANS-Stems, roots and leaves
Give a few benefits of exercise. - ANS-Both the coronary heart and lungs turn out to be
large. They each increase a bigger and extra efficient blood deliver
Give a few makes use of of micro organism. - ANS-We make meals like yoghgurt and
cheese. Others are utilized in sewage treatment and to make medicines.
Give the 2 primary diversifications of root hair cells. - ANS-The root hairs increase the
surface vicinity for water to transport into the cellular. They have a large permanent vacuole
that quickens the movement of water with the aid of osmosis from the soil to the root hair
cellular.
Give the adaptations of a sperm mobile. - ANS-Long tail for movement, middle phase full of
mitochondria to give energy, the acrosome which shops digestive enzymes for breaking
down the outer layers of the egg, a huge nucleus.
How are chromosomes arranged in body cells? - ANS-In frame cells, chromosomes are
organized in pairs.
How are Cone cells from the human eye specialised? - ANS-The outer segment carries a
unique chemical - a visible pigment. The center section is packed complete of mitochondria
to release strength. The final element is a specialised synapse that connects to the optic
nerve.
How are enzymes worried within the breakdown of food? - ANS-Different enzymes catalyse
the breakdown of carbohydrates, proteins and fat into smaller, soluble molecules in the
course of digestion.
How are enzymes used in medication? - ANS-To check for liver disease, take a look at for
diabetes, and additionally help remedy pancreas, blood clots and cancer
How are enzymes used inside the meals enterprise? - ANS-Proteases are used to make
toddler ingredients.
Carbohydrases are used to convert starch into glucose syrup.
How are fat cells specialised? - ANS-They have a small quantity of cytoplasm and massive
quantities of fat. They have few mitochondria as the cellular want very little power. They can
extend - a fat cellcan end up a thousand times its authentic size.
How are fossils fashioned? - ANS-1) Formed from the tough parts of animals that don't
decay effortlessly along with bones,tooth, claws or shells.
2) When the animal or plant does no longer decay due to the fact there may be no oxygen,
temperature is too low, or poisonous gases kill off the micro organism that motive decay.
Three) Most commonly, while harder components of the animal or plant are replaced by
means of different minerals.
4) Some fossils are traces consisting of footprints, burrows, rootlet strains and droppings.
How are human genetic issues inherited? - ANS-A end result of troubles within the genes
that can be passed on from discern to infant.
Are human cells the same as other animal cells? - ANS-Most human cells are like maximum
different animal cells and incorporate a nucleus, cytoplasm, membrane, mitochondria and
ribosomes.
Are there any problems related to embryo screening? - ANS-Some humans in affected
Huntingdon's families take the check to decide whether or not to marry or have a circle of
relatives. Others prefer not to understand.
Some couples have their embryos examined at some stage in pregnancy after which decide
to maintain or abort.
Other couples have their embryos screened before they may be implanted by IVF.
Describe the structure of a yeast cellular. - ANS-Each cell has a nucleus, cytoplasm and a
membrane surrounded with the aid of a cell wall.
Does the size of the pattern matter? - ANS-Yes. If you do a ten quadrat sample, it will now
not be as reproducible or as valid as in case you perform one hundred quadrats.
Expain the structure and feature of the mitochondria. - ANS-Structures within the cytoplasm
wherein oxygen is used and maximum of the electricity is released throughout respiratory.
Explain the function of ribosomes - ANS-Where protein synthesis takes location. All the
proteins wanted inside the cellular are made here.
Explain the function of the cellular membrane. - ANS-Controls the passage of materials into
and out of the cellular.
Explain the feature of the nucleus in cells - ANS-Controls all of the sports inside the cell. It
contains the genes at the chromosomes.
Explain the shape and feature of the cytoplasm - ANS-A liquid gel in which maximum of the
chemical reactions wanted for lifestyles take place.
Give three matters which could affect the charge of diffusion. - ANS-1).The more the
distinction in awareness, the quicker the rate of diffusion. 2) an increase in temperature
approach the particles in a fuel or answer flow extra speedy so diffusion hastens. 3) An
growth in the floor region of a cellular membrane manner that diffusion can take location
greater quick.
Give four causes of extinction in a species of living organisms. - ANS-At times of extreme
warmness in the world, ice ages, large volcanic eruptions and collision of asteroids with
earth.
Give four reasons in opposition to the use of embryonic stem cells. - ANS-1) They are still
experimental and there may be a hazard that they'll motive in addition issues which include
cancer
2) All embryos have the capacity to become infants so it is inaccurate to experiment on
them.
3) Embryos cannot provide permission, so it's miles unethical.
4) It is taking a long time to expand any remedy that works - so the cash will be higher spent
on new pills.
Give five motives to be in favour of the usage of embryonic stem cells. - ANS-1) They deliver
one of the excellent chances of finding remedies for exclusive and often extreme situations.
, 2) The embyos used are normally spare ones from infertility treatment and could be
destroyed besides.
3) Embryos are being constituted of adult cells in use in research - they would by no means
be babies.
4) It can be possible to apply embryonic stem cells from the umbillical cords of new child
infants.
5) Emryonic stem cells might be used to grow new tissues and organs for transplants.
Give an example of plant cells that do not have Chloroplastsand give an explanation for why
they have got none. - ANS-Root cells do no longer have chloroplasts because they're
underground and do not photosynthesise.
Give examples of plant organs. - ANS-Stems, roots and leaves
Give a few benefits of exercise. - ANS-Both the coronary heart and lungs turn out to be
large. They each increase a bigger and extra efficient blood deliver
Give a few makes use of of micro organism. - ANS-We make meals like yoghgurt and
cheese. Others are utilized in sewage treatment and to make medicines.
Give the 2 primary diversifications of root hair cells. - ANS-The root hairs increase the
surface vicinity for water to transport into the cellular. They have a large permanent vacuole
that quickens the movement of water with the aid of osmosis from the soil to the root hair
cellular.
Give the adaptations of a sperm mobile. - ANS-Long tail for movement, middle phase full of
mitochondria to give energy, the acrosome which shops digestive enzymes for breaking
down the outer layers of the egg, a huge nucleus.
How are chromosomes arranged in body cells? - ANS-In frame cells, chromosomes are
organized in pairs.
How are Cone cells from the human eye specialised? - ANS-The outer segment carries a
unique chemical - a visible pigment. The center section is packed complete of mitochondria
to release strength. The final element is a specialised synapse that connects to the optic
nerve.
How are enzymes worried within the breakdown of food? - ANS-Different enzymes catalyse
the breakdown of carbohydrates, proteins and fat into smaller, soluble molecules in the
course of digestion.
How are enzymes used in medication? - ANS-To check for liver disease, take a look at for
diabetes, and additionally help remedy pancreas, blood clots and cancer
How are enzymes used inside the meals enterprise? - ANS-Proteases are used to make
toddler ingredients.
Carbohydrases are used to convert starch into glucose syrup.
How are fat cells specialised? - ANS-They have a small quantity of cytoplasm and massive
quantities of fat. They have few mitochondria as the cellular want very little power. They can
extend - a fat cellcan end up a thousand times its authentic size.
How are fossils fashioned? - ANS-1) Formed from the tough parts of animals that don't
decay effortlessly along with bones,tooth, claws or shells.
2) When the animal or plant does no longer decay due to the fact there may be no oxygen,
temperature is too low, or poisonous gases kill off the micro organism that motive decay.
Three) Most commonly, while harder components of the animal or plant are replaced by
means of different minerals.
4) Some fossils are traces consisting of footprints, burrows, rootlet strains and droppings.
How are human genetic issues inherited? - ANS-A end result of troubles within the genes
that can be passed on from discern to infant.
