BANK ITEM BIOLOGI SPM 2020

(a) The diagram shows a model of plasma membrane. Rajah berikut menunjukkan satu model membrane plasma. (i) On the diagram, label structures labelled P and Q. Pada rajah, labelkan struktur yang berlabel P dan Q.

(a) The diagram shows a model of plasma membrane. Rajah berikut menunjukkan satu model membrane plasma. (ii) Describe the characteristics of R. Huraikan ciri-ciri struktur R.

(a) The diagram shows a model of plasma membrane. Rajah berikut menunjukkan satu model membrane plasma. (iii) Name one substance that able to diffuse through R. State the characteristic of the substance. Namakan satu bahan yang boleh meresap melalui R. Nyatakan satu ciri bahan tersebut.

Amino acids are transported across the plasma membrane through structure labelled S. Explain why. Asid amino diangkut merentasi membran plasma melalui struktur berlabel S. Terangkan mengapa.

The concentration of potassium ions, K+ is accumulated in the cell while the sodium ions, Na+ is eliminated out of the cell into the body fluid. Kepekatan ion kalium, K+ berkumpul di dalam sel manakala ion natrium, Na+ disingkir dari sel ke dalam bendalir badan. (i) Name the process that bring to the above situation. Namakan proses yang menyebabkan situasi di atas terjadi.

The concentration of potassium ions, K+ is accumulated in the cell while the sodium ions, Na+ is eliminated out of the cell into the body fluid. Kepekatan ion kalium, K+ berkumpul di dalam sel manakala ion natrium, Na+ disingkir dari sel ke dalam bendalir badan. (ii) Explain how the process stated in (c)(i) causes the above situation. Terangkan bagaimana proses dalam (c)(i) menyebabkan situasi di atas.

(a) The diagram shows two processes that take place in the structures of two different organisms. Rajah berikut menunjukkan dua proses yang berlaku di dalam struktur dua jenis organisma yang berlainan. (i) Based on the diagram, name process B. Berdasarkan rajah, namakan proses B.

(a) The diagram shows two processes that take place in the structures of two different organisms. Rajah berikut menunjukkan dua proses yang berlaku di dalam struktur dua jenis organisma yang berlainan. (ii) State one characteristic of molecule Q. Nyatakan satu ciri molekul Q.

(a) The diagram shows two processes that take place in the structures of two different organisms. Rajah berikut menunjukkan dua proses yang berlaku di dalam struktur dua jenis organisma yang berlainan. (iii) State two differences between the characteristics of the processes based on the following aspects: Nyatakan dua perbezaan antara ciri-ciri proses-proses berdasarkan aspek berikut: Aspect Aspek Characteristic Ciri Movement of substance P Pergerakan bahan P Movement of substance Q Pergerakan bahan Q Requirement of energy Keperluan tenaga Involvement of protein Penglibatan protein

(b) (i) Using the information in the diagram, explain the movement of substance P across the plasma membrane of root hair cell. Menggunakan maklumat dalam rajah, terangkan pergerakan bahan P merentasi membran plasma sel rambut akar.