Proses transport dan pertukaran gas pada sistem pernapasan manusai dapat terbagi menjadi transport oksigen dan transport karbondioksida. Manakah pernyataan yang benar mengenai proses transport oksigen
A. 97% oksigen dalam darah terikat oleh hemoglobin (Hb) eritrosit dan sisanya larut dalam plasma darah
B. Hemoglobin mempunyai 2 gugus heme yang dapat berikatan dengan O2 membentuk oksihemoglobin (HbO2)
C. Setiap molekul Hb mengandung 2 gugus heme sehingga molekul tersebut dinyatakan sebagai Hb2
D. Jika 2 molekul Hb berikatan dengan 4 molekul O2 maka akan terbentuk HBO2
E. Reaksi pengikatan Hb dengan O2 berlangsung lambat
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› Soal #39920 : PTS 1 Bahasa Inggris SMP Kelas 9Read the following text to answer the questions!
How to Repel Mice
Mice might look cute, but they can be harmful pets that destroy household items, eat and mess with food and can spread severe diseases through their feces and parasites they carry. Here are some useful tips on how to repel house mice:
1. Use peppermint, put the peppermint near wall corners.
2. Pour generous amount of peppermint oil on cotton balls.
3. Place the saturated cotton balls on areas where mice are possibly seen-around counter tops, under the sofas in your living room.
4. Put them behind shelves, wall corners or on the floor beneath your kitchen sink.
"Put them behind shelves ..."The word "them" refers to ....
A. Pets
B. Cotton Balls
C. Peppermint
D. Peppermint oil
› Soal #42079 : PTS Bahasa Inggris SMP Kelas 7
Mother : Have you returned your laptop to your brother, Elsa?
Elsa : I am sorry mom, I haven't returned it
Mother : It's okay, But, you have to return it tomorrow, because he needs to do his thesis
Elsa : Okay, Mom
The underlined sentence means....her brother's laptop
A. the mother forgot
B. Elsa bring his brother's laptop
C. Elsa did'nt remember to return
D. The mother reminded
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