poonchengmoh
About Me
- cikgubio
- My name is Poon Cheng Moh. I have been teaching biology in SMK(P) Raja Zarina, Port Klang for 26 years. I sincerely hope that this blog on SPM Biology will be useful to both teachers and students.
Tuesday, July 7, 2015
Comparing mitosis and meiosis
Mitosis
|
Meiosis
|
Prophase
|
Prophase 1
|
Metaphase
|
Metaphase 1
|
Anaphase
|
Anaphase 1
|
Telophase
|
Telophase
1
|
No
Interphase, no replication of DNA
|
|
Prophase 2
|
|
Metaphase
2
|
|
Anaphase 2
|
|
Telophase
2
|
Friday, May 8, 2015
MITOSIS & CYTOKINESIS
http://highered.mheducation.com/olcweb/cgi/pluginpop.cgi?it=swf::535::535::/sites/dl/free/0072437316/120073/bio14.swf::Mitosis%20and%20Cytokinesis
Prophase
• The chromosomes in the nucleus condense and become more tightly coiled.
• Each chromosome now consists of a pair of sister chromatids joined together at the centromere.
• In the cytoplasm, the spindle fibres begin to form and extend between the centrioles.
• Each pair of centrioles then migrates to lie at the opposite poles of the cell. The chromatids are attached to the fibres of the spindle by their centromeres.
• At the end of prophase, the nucleolus disappears and the nuclear membrane disintegrates.
Metaphase
• Metaphase begins when the centromeres of all the chromosomes are lined up on the metaphase plate, an imaginary plane across the middle of the cell.
• The mitotic spindle is now fully formed.
• The two sister chromatids are still attached to one another at the centromere.
• Metaphase ends when the centromere divide.
Anaphase
• During anaphase, the two sister chromatids of each chromosome separate at the centromere.
• The sister chromatids are pulled apart to the opposite poles by the shortening of the spindle fibres.
• Once separated, the chromatids are referred to as daughter chromosomes.
• By the end of anaphase, the two poles of the cell have complete and equivalent sets of chromosomes.
Telophase
• Begins when the two sets of chromosomes reach the opposite poles of the cell.
• The chromosomes start to uncoil and revert to their extended state (chromatin).
• The chromosomes become less visible under the microscope.
• The spindle fibres disappear and a new nuclear membrane forms around each set of chromosomes.
• The nucleolus also reforms in each nucleus.
• The process of mitosis is now completed.
Tuesday, March 10, 2015
FORMAT AMALI BIOLOGI SPM (4551/3A)
***AMALI BIOLOGI SPM (4551/3A) DITANGGUHKAN KE TAHUN 2016
Bil.
|
Perkara
|
KERTAS 3 (4551/3A)
|
1
|
Jenis
instrumen
|
Ujian
Amali
|
2
|
Jenis
item
|
Item
subjektif : Item berstruktur
|
3
|
Bilangan
soalan
|
2
soalan (Jawab semua)
|
4
|
Jumlah
Markah
|
30 (Wajaran 16.7%)
|
5
|
Cara
Memberi Respons
|
Ditulis
pada ruang dalam kertas soalan
|
6
|
Tempoh
Ujian
|
1
jam 45 minit (Termasuk 15 minit masa
merancang)
|
7
|
Konstruk
|
·
Kemahiran proses sains
·
Kemahiran manipulatif
|
8
|
Pemarkahan
|
Pemarkahan
secara analitikal dan holistik berdasarkan rubrik penskoran
|
9
|
Cakupan Konteks
|
Bidang
pembelajaran Tingkatan 4 dan
Tingkatan 5
|
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