2017 DSE Bio 討論區(2)

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2017-04-23 20:25:33
DNA RNA 轉錄 轉譯果課 係用黎做咩?
我背曬啲步驟但題目一出我完全唔知佢問緊呢課
e.g. 2014 Q6



留意footnote detailed步驟outsyl

sorry 我中文Bio
睇唔明


轉錄同轉譯啲詳細步驟唔會考

啫係淨係要知DNA--> transcript = mRNA---->translation= Protein??


DNA--> transcript = mRNA---->translation 啱
但係translation之後都只會係一條polypeptide chain,而一條polypeptide chain未必係一個protein,所以之後要做modification:
- polypeptide chains coil/fold up
- some polypeptide chain bind together

你可以check返2013 DSE Essay
2017-04-23 20:25:36

兩者都有
睇density (cell bodies vs myelinated axon)


又係outsyl,DSE myelination唔包cell body,現實都好少講包cell body。

Myelin sheath包nerve fibres嘅作用係:
- insulate the nerve fibres to prevent transmission of nerve impulses to the surroundings.
- speed up transmission of nerve impulses

我係話包 cell bodies

我指grey matter一樣有myelin sheath and cell bodies
但點解會grey因為相對多cell bodies

Grey matters包cell bodies


唔係架,DSE入面grey matter consists of cell bodies,white matters consists of nerve fibres。

Oic..
但其實唔合理。
因為spinal cord grey matter

Eg withdrawl reflex
Where axon terminal of sensory neurone - interneurone - motor neurone connected

The myelinated axon terminal of sensory neurone x dendrite of dendron of interneurone

所以,我都唔知syll想點

我就係唔明嚟樣,成條interneuron 係grey matter入面有,而佢又有myelinated nerve

係啊
所以因爲no of cell bodies > no of myelinated nerve in grey matter

Overall: grey in color
2017-04-23 20:26:15
Myelinated nerve 喺係grey matter 定white matter入面?or depend on neurons?

兩者都有
睇density (cell bodies vs myelinated axon)


又係outsyl,DSE myelination唔包cell body,現實都好少講包cell body。

Myelin sheath包nerve fibres嘅作用係:
- insulate the nerve fibres to prevent transmission of nerve impulses to the surroundings.
- speed up transmission of nerve impulses

我係話包 cell bodies

我指grey matter一樣有myelin sheath and cell bodies
但點解會grey因為相對多cell bodies

Grey matters包cell bodies

正正係white matter多myelin sheath先顯得“white”

好似係
2017-04-23 20:27:29


又係outsyl,DSE myelination唔包cell body,現實都好少講包cell body。

Myelin sheath包nerve fibres嘅作用係:
- insulate the nerve fibres to prevent transmission of nerve impulses to the surroundings.
- speed up transmission of nerve impulses

我係話包 cell bodies

我指grey matter一樣有myelin sheath and cell bodies
但點解會grey因為相對多cell bodies

Grey matters包cell bodies


唔係架,DSE入面grey matter consists of cell bodies,white matters consists of nerve fibres。

Oic..
但其實唔合理。
因為spinal cord grey matter

Eg withdrawl reflex
Where axon terminal of sensory neurone - interneurone - motor neurone connected

The myelinated axon terminal of sensory neurone x dendrite of dendron of interneurone

所以,我都唔知syll想點

我就係唔明嚟樣,成條interneuron 係grey matter入面有,而佢又有myelinated nerve

係啊
所以因爲no of cell bodies > no of myelinated nerve in grey matter

Overall: grey in color

不過應該唔會咁考既...
所以當諗深入d withdrawl reflex究竟發生咩事亦未嘗不可
2017-04-23 20:28:05

兩者都有
睇density (cell bodies vs myelinated axon)


又係outsyl,DSE myelination唔包cell body,現實都好少講包cell body。

Myelin sheath包nerve fibres嘅作用係:
- insulate the nerve fibres to prevent transmission of nerve impulses to the surroundings.
- speed up transmission of nerve impulses

我係話包 cell bodies

我指grey matter一樣有myelin sheath and cell bodies
但點解會grey因為相對多cell bodies

Grey matters包cell bodies


唔係架,DSE入面grey matter consists of cell bodies,white matters consists of nerve fibres。

Oic..
但其實唔合理。
因為spinal cord grey matter

Eg withdrawl reflex
Where axon terminal of sensory neurone - interneurone - motor neurone connected

The myelinated axon terminal of sensory neurone x dendrite of dendron of interneurone

所以,我都唔知syll想點


你搞清楚先:
Spinal cord係有grey matter,冇錯,但係亦有white matter。同我講嘅野有衝突咩?
grey matter consists of cell bodies,white matters consists of nerve fibres
而Myelination只會發生係nerve fibres,cell bodies冇myelination。
DSE就係咁簡單。

無衝突
我都無話myelination in cell bodies

我只係話grey matters 同時有cell bodies and myelinated axon 而已


咁係DSE角度嚟講就係唔啱。 唔會睇咩比例。 Grey matter冇myelination冇myelinated axon。
2017-04-23 20:28:54
我覺得厹考dse會出事
2017-04-23 20:29:46

我係話包 cell bodies

我指grey matter一樣有myelin sheath and cell bodies
但點解會grey因為相對多cell bodies

Grey matters包cell bodies


唔係架,DSE入面grey matter consists of cell bodies,white matters consists of nerve fibres。

Oic..
但其實唔合理。
因為spinal cord grey matter

Eg withdrawl reflex
Where axon terminal of sensory neurone - interneurone - motor neurone connected

The myelinated axon terminal of sensory neurone x dendrite of dendron of interneurone

所以,我都唔知syll想點


你搞清楚先:
Spinal cord係有grey matter,冇錯,但係亦有white matter。同我講嘅野有衝突咩?
grey matter consists of cell bodies,white matters consists of nerve fibres
而Myelination只會發生係nerve fibres,cell bodies冇myelination。
DSE就係咁簡單。

無衝突
我都無話myelination in cell bodies

我只係話grey matters 同時有cell bodies and myelinated axon 而已


咁係DSE角度嚟講就係唔啱。 唔會睇咩比例。 Grey matter冇myelination冇myelinated axon。

Get到你意思...
咁你岩,我地考緊dse大前提既試,唔係學術研究
2017-04-23 20:30:22
我覺得厹考dse會出事

我都覺會出事
所以我今日成日睇syllabus, 睇下有咩學多左
2017-04-23 20:34:03
In deducing dominant character

At least one of parents must have at least one allele for normal character
At least one of parents must have one allele for normal character
邊句好啲
2017-04-23 20:34:41
Why gene therapy cannot cure dominant disease?
2017-04-23 20:37:06
In deducing dominant character

At least one of parents must have at least one allele for normal character
At least one of parents must have one allele for normal character
邊句好啲


下面嗰句錯概念
單慿deduction,唔一定係one allele,可以係two alleles
2017-04-23 20:37:15
In deducing dominant character

At least one of parents must have at least one allele for normal character
At least one of parents must have one allele for normal character
邊句好啲

你其實推論呢句之前,
已經知offspring 一定有parent phenotyically 無既野
-> which is inherited from either of the parents

所以,大前提下,唔洗再講either parent must have at least one allele for xxx
2017-04-23 20:38:45
In deducing dominant character

At least one of parents must have at least one allele for normal character
At least one of parents must have one allele for normal character
邊句好啲

你其實推論呢句之前,
已經知offspring 一定有parent phenotyically 無既野
-> which is inherited from either of the parents

所以,大前提下,唔洗再講either parent must have at least one allele for xxx

你反而講either must have xxx allele
-> either one or two
2017-04-23 20:39:26
In deducing dominant character

At least one of parents must have at least one allele for normal character
At least one of parents must have one allele for normal character
邊句好啲


下面嗰句錯概念
單慿deduction,唔一定係one allele,可以係two alleles



我見CE 用我下面咁寫
2017-04-23 20:39:32
In deducing dominant character

At least one of parents must have at least one allele for normal character
At least one of parents must have one allele for normal character
邊句好啲

你其實推論呢句之前,
已經知offspring 一定有parent phenotyically 無既野
-> which is inherited from either of the parents

所以,大前提下,唔洗再講either parent must have at least one allele for xxx



我覺得你聽日真係會出事
2017-04-23 20:40:55
In deducing dominant character

At least one of parents must have at least one allele for normal character
At least one of parents must have one allele for normal character
邊句好啲


下面嗰句錯概念
單慿deduction,唔一定係one allele,可以係two alleles



我見CE 用我下面咁寫

用must posses xxx allele 就一定岩
因為可以one or both two alleles

因為唔知one allele or two allele
2017-04-23 20:41:45
In deducing dominant character

At least one of parents must have at least one allele for normal character
At least one of parents must have one allele for normal character
邊句好啲


下面嗰句錯概念
單慿deduction,唔一定係one allele,可以係two alleles



我見CE 用我下面咁寫

姐係我講
As individual X has normal character so he must have at least one allele for normal character that is inherited from either one of parents
已經足夠?
唔使再講at least one of parents has at least one allele for normal ?
2017-04-23 20:41:49
In deducing dominant character

At least one of parents must have at least one allele for normal character
At least one of parents must have one allele for normal character
邊句好啲

你其實推論呢句之前,
已經知offspring 一定有parent phenotyically 無既野
-> which is inherited from either of the parents

所以,大前提下,唔洗再講either parent must have at least one allele for xxx



我覺得你聽日真係會出事

我下面有補充番

因為show 到有xxx phenotype
-> it must have allele for xxx phenotype
-> but it can be 1 or two
2017-04-23 20:45:31
In deducing dominant character

At least one of parents must have at least one allele for normal character
At least one of parents must have one allele for normal character
邊句好啲


下面嗰句錯概念
單慿deduction,唔一定係one allele,可以係two alleles



我見CE 用我下面咁寫


你用返份新啲嘅marking睇下同一樣嘅題型啦
2017-04-23 20:46:07
In deducing dominant character

At least one of parents must have at least one allele for normal character
At least one of parents must have one allele for normal character
邊句好啲


下面嗰句錯概念
單慿deduction,唔一定係one allele,可以係two alleles



我見CE 用我下面咁寫

姐係我講
As individual X has normal character so he must have at least one allele for normal character that is inherited from either one of parents
已經足夠?
唔使再講at least one of parents has at least one allele for normal ?


2017-04-23 20:48:31
大家呢個時候要重溫DSE卷啦
2017-04-23 20:49:20
In deducing dominant character

At least one of parents must have at least one allele for normal character
At least one of parents must have one allele for normal character
邊句好啲


下面嗰句錯概念
單慿deduction,唔一定係one allele,可以係two alleles



我見CE 用我下面咁寫


你用返份新啲嘅marking睇下同一樣嘅題型啦


我見到比較新嘅marking
用 that is inherited from either parents 就ok
2017-04-23 20:54:34
In deducing dominant character

At least one of parents must have at least one allele for normal character
At least one of parents must have one allele for normal character
邊句好啲


下面嗰句錯概念
單慿deduction,唔一定係one allele,可以係two alleles



我見CE 用我下面咁寫


你用返份新啲嘅marking睇下同一樣嘅題型啦


我見到比較新嘅marking
用 that is inherited from either parents 就ok


你唔係問緊下面兩句at least one嗰個位咩
At least one of parents must have at least one allele for normal character
At least one of parents must have one allele for normal character
2017-04-23 21:14:35
In deducing dominant character

At least one of parents must have at least one allele for normal character
At least one of parents must have one allele for normal character
邊句好啲


下面嗰句錯概念
單慿deduction,唔一定係one allele,可以係two alleles



我見CE 用我下面咁寫


你用返份新啲嘅marking睇下同一樣嘅題型啦


我見到比較新嘅marking
用 that is inherited from either parents 就ok


你唔係問緊下面兩句at least one嗰個位咩
At least one of parents must have at least one allele for normal character
At least one of parents must have one allele for normal character

係呀
2017-04-23 21:22:36
Why gene therapy cannot cure dominant disease?
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