AQA GCSE BIOLOGY UNIT 1 Question Game!

OP

Original post by JakeAntonyBrown

Again, perfect. What are you aiming for tomorrow? :biggrin:

I'm aiming to make the examiner like me :P
And get A*

Reply 122

Elleee1234

18

Original post by JakeAntonyBrown

Measles, mumps and rubella

Correct again :smile:

Reply 123

Original post by Elleee1234

well im doing foundation as i havent been peforming well in the mocks however i have 2 A's in my coursework so i aiming for high D in all exams what about you?

A*

Reply 124

Original post by IAmAnTroll

I'm aiming to make the examiner like me :P
And get A*

Same. I'm learning like random Biology things just to slip in. :biggrin:

Reply 125

Elleee1234

18

Original post by JakeAntonyBrown

A*

Good luck then :smile:

Reply 126

Original post by Elleee1234

Correct again :smile:

Reply 127

Original post by Elleee1234

Good luck then :smile:

Thanks, and to you too. :smile:

Reply 128

OP

Q: Describe how tissue culture is used to clone plants. (2 marks)

Reply 129

What is Antibiotic resistance? Why is it a problem?

Reply 130

Original post by IAmAnTroll

Q: Describe how tissue culture is used to clone plants. (2 marks)

1. Tissue sample scrapped from parent plant.
2. Tissue sample placed in Agar growth medium containing nutrients and hormones.
3. Samples developed into tiny plantlets.
4. Plantlets placed into compost.

Reply 131

OP

Original post by JakeAntonyBrown

What is Antibiotic resistance? Why is it a problem?

Mutations of a pathogen can produce new strains. These strains can be resistant to the antiobiotic. When the antibiotic is applied the non-resistant pathogens are killed and the resistant pathogens survive, reproduce and produce a whole population of antiobiotic-resistance pathogens. It is a problem because overuse of a particular antiobiotic can make the pathogens that the antiobiotic is trying to destroy resistant, so the antibiotic will no longer have any use in terms of killing that pathogen and therefore an alternative antiobiotic must be found which requires scientific research and is expensive.

Reply 132

Original post by IAmAnTroll

Mutations of a pathogen can produce new strains. These strains can be resistant to the antiobiotic. When the antibiotic is applied the non-resistant pathogens are killed and the resistant pathogens survive, reproduce and produce a whole population of antiobiotic-resistance pathogens. It is a problem because overuse of a particular antiobiotic can make the pathogens that the antiobiotic is trying to destroy resistant, so the antibiotic will no longer have any use in terms of killing that pathogen.

Perfect.

Reply 133

Groves1999

Original post by IAmAnTroll

FSH is produced in the pituitary gland and matures the egg and stimulates the production of LH

Q: Explain how phototropism and geotropism work in plants (6 marks)

Phototropism - Auxins are prduced into the tip of the shoot they defuse down the the shoot and the side at which is facing the sun, there auxins are broken down. The shady side auxins stimulate growth causing the shoot to bend towards the light.

Gravitropism - roots produce auxins which are sensitive to gravity, the auxins build up at the side at which gravity pulls down. This stimulated growth on the opposite side of the plant causing it to grow down

Q what are the advantages and disadvantages of gm 6 marks

Reply 134

How does the synapse work?

Reply 135

JKING>)

10

Original post by Londonsfalling

Can someone please clearly outline what each of these hormones do:
- FSH
- Oestrogen
- LH
- Progesterone

In as much detail as possible because some places claim that the hormones do the same thing like LH and oestrogen apparently release the mature egg. Which one really does it?!! Also if oestrogen is supposed to limit FSH production then why in my graph does FSH reach its peak at the same time as oestrogen? They appear to mirror each other not stimulate or inhibit each other.

FSH: Mature the egg and stimulates the production of oestrogen. FSH is found in the pituitary gland.
Oestrogen: Thickens the lining of the womb/uterus. Stimulates the production of LH and inhibits the production FSH. Oestrogen is found in the ovaries.
LH: Released the matured egg. LH is secreted in the pituitary gland (same as FSH).
Progesterone: Triggers the lining of the womb to accept the egg. Prohibits muscle contraption in the uterus. Is secreted by the corpus lutuem.

Reply 136

Original post by JustasB

FSH: Mature the egg and stimulates the production of oestrogen. FSH is found in the pituitary gland.
Oestrogen: Thickens the lining of the womb/uterus. Stimulates the production of LH and inhibits the production FSH. Oestrogen is found in the ovaries.
LH: Released the matured egg. LH is secreted in the pituitary gland (same as FSH).
Progesterone: Triggers the lining of the womb to accept the egg. Prohibits muscle contraption in the uterus. Is secreted by the corpus lutuem.

Yep.

Reply 137

OP