Lembar rumus, langkah-langkah metode utama untuk setiap topik, dan 16 soal latihan, dengan pembahasan lengkap di bagian belakang.
The new park is the most beautiful place in the city. It has 200 trees, a playground and a small lake. Which statement from the passage is an opinion?
The author writes: “Some argue that we should spend money on space exploration only after solving problems on Earth. But research for space has led to inventions used in medicine and everyday life.” What is the purpose of the second sentence?
Pecahan atau bilangan campuran paling sederhana mana yang sama dengan desimal 2,16? Klik jawabannya.
Diagram lingkaran menunjukkan pembagian 400 karyawan rumah sakit ke departemen A sampai D. Berapa lebih banyak karyawan x yang bekerja di departemen B daripada di departemen C?
Di mana sumsum tulang belakang biasanya berakhir pada orang dewasa?
Pada janin, duktus arteriosus menghubungkan trunkus pulmonalis dengan aorta. Menjadi apa struktur ini setelah lahir?
Apa efek utama aldosteron pada ginjal?
Dalam sistem renin–angiotensin–aldosteron, di mana angiotensin I terutama diubah menjadi angiotensin II?
How does facilitated diffusion differ from active transport?
A cube-shaped cell has sides of 2 µm. What is its surface area-to-volume ratio?
How does atomic radius change going down a group?
Gently heating DNA separates its two strands, but each strand stays in one piece. Why?
Choose the correct article: “She wants to become ___ university professor.”
Which sentence correctly uses an appositive?
Choose the meaning of the word in bold: “The infection is latent and causes no symptoms now.”
Choose the meaning of the word in bold: “The patient was taught to recognise the precursors of a migraine.”
Jawaban: A · The new park is the most beautiful place in the city.
“Most beautiful” is a personal judgement. The number of trees, the playground and the lake are facts that can be checked.
Jawaban: C · To show that space research also benefits Earth
The second sentence counters the first view by showing that space research has produced useful inventions on Earth.
Jawaban: 2 4/25
Pecahan, desimal, dan persen adalah tiga cara menulis bilangan yang sama. Pecahan → desimal: bagi pembilang dengan penyebut. Desimal → persen: kalikan 100 (geser koma dua tempat ke kanan). Persen → desimal: bagi 100. Desimal → pecahan: tulis angkanya di atas 10, 100, atau 1000 (satu nol untuk setiap angka di belakang koma) lalu sederhanakan.
Jawaban: x = 40
Membaca grafik dan tabel: baca judul, kategori, dan skala lebih dahulu. Pada diagram batang atau grafik garis, ikuti puncak batang atau titik secara mendatar ke sumbu vertikal; setiap garis kisi adalah satu langkah skala. Diagram lingkaran menunjukkan bagian dari keseluruhan: juring p% mewakili p% dari total dan bersudut p% dari 360°.
Jawaban: C · Sekitar setinggi ruas L1–L2
Pada orang dewasa sumsum berakhir di konus medularis dekat L1–L2. Di bawahnya ada kauda ekuina, sehingga pungsi lumbal dilakukan di L3–L4 atau L4–L5.
Jawaban: A · Ligamentum arteriosum
Duktus arteriosus menutup setelah lahir dan menjadi ligamentum arteriosum. Foramen ovale menjadi fossa ovalis dan duktus venosus menjadi ligamentum venosum.
Jawaban: A · Reabsorpsi natrium dan sekresi kalium di nefron distal
Aldosteron bekerja pada tubulus distal dan duktus koligens untuk meningkatkan reabsorpsi Na⁺ dan sekresi K⁺. Air mengikuti natrium, sehingga volume darah naik.
Jawaban: B · Di paru-paru
Renin (ginjal) memecah angiotensinogen (hati) menjadi angiotensin I, yang diubah ACE, terutama di endotel kapiler paru, menjadi angiotensin II.
Jawaban: A · It needs no energy and moves substances down their gradient
Both use membrane proteins, but facilitated diffusion is passive: substances move from high to low concentration without ATP. Active transport uses energy to move substances from low to high concentration.
Jawaban: B · 3 : 1
Surface area = 6 × 2² = 24 µm² and volume = 2³ = 8 µm³, so the ratio is 24 : 8 = 3 : 1. A 1 µm cube has a ratio of 6 : 1, which shows that the ratio falls as a cell grows.
Jawaban: A · It increases
Each step down a group adds another electron shell, so the outer electrons are farther from the nucleus and the atoms get larger.
Jawaban: D · The strands are held together by weak hydrogen bonds, while each strand's backbone is covalent
The bases pair across the two strands through hydrogen bonds, which are relatively weak and break on heating. The sugar–phosphate backbone of each strand is held by strong covalent bonds, which stay intact.
Jawaban: B · a
“University” begins with a “yoo” (consonant) sound, so it takes “a”, even though it starts with the letter u.
Jawaban: B · Dr. Lee, our family physician, retired last year.
“Our family physician” renames Dr. Lee and adds extra information, so it needs a comma before and after it.
Jawaban: B · Present but not active or visible
Latent means present but hidden or inactive, like a virus that stays dormant in the body.
Jawaban: C · Warning signs that come before it
A precursor is something that comes before and signals what follows.
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