Lembar rumus, langkah-langkah metode utama untuk setiap topik, dan 16 soal latihan, dengan pembahasan lengkap di bagian belakang.
To make a cup of tea, first boil the water. Next, put a tea bag in the cup and pour the hot water over it. Let it steep for three to five minutes, then remove the bag and add milk if you like. Which step comes immediately before removing the tea bag?
The author writes: “Since the city put up speed cameras, the number of crashes has fallen. The cameras also earned the city a lot of money in fines. Critics say this proves the cameras are only about money.” Why is the critics’ conclusion weak?
Ubah 4,2 km menjadi sentimeter x.
Pada peta, 1 cm mewakili 5 km. Dua kota berjarak 92,5 km. Berapa jarak keduanya x pada peta, dalam sentimeter?
Bagian otak mana yang terutama bertanggung jawab atas koordinasi dan keseimbangan?
Setelah operasi kelenjar getah bening aksila, skapula seorang pasien menonjol dari dinding dada saat mendorong dinding. Saraf mana yang rusak?
Bagaimana glukagon menaikkan glukosa darah?
Menurut hubungan panjang–tegangan, mengapa serabut otot rangka menghasilkan gaya lebih kecil saat teregang berlebihan?
The sodium-potassium pump moves ions across the cell membrane. What does one cycle of the pump do?
A nurse notices that patients who used a new mouthwash had few mouth infections. No other patients were studied. What is most needed before concluding that the mouthwash works?
Which equation shows a combustion reaction?
Frying an egg turns the clear egg white solid and white. What happens to the proteins?
Which spelling is correct for the adverb form of “true”?
Which sentence shows that the writer has only one brother?
Choose the meaning of the word in bold: “The patient was unable to void after surgery.”
What does the term cholecystitis mean?
Jawaban: D · Letting the tea steep for three to five minutes
The tea steeps for three to five minutes, and then the bag is removed. Milk is added after that.
Jawaban: C · Earning money does not rule out improving safety.
The cameras can both earn money and reduce crashes. Earning fines does not prove that money is their only purpose.
Jawaban: x = 420000 cm
Konversi satuan: kalikan dengan faktor yang bernilai 1, ditulis sehingga satuan lama habis dicoret: 3 ft × 12 in/1 ft = 36 in. Panjang metrik: 1 km = 1000 m, 1 m = 100 cm = 1000 mm, 1 cm = 10 mm. Satuan AS: 1 ft = 12 in, 1 yd = 3 ft, 1 mi = 5280 ft; 1 gal = 4 qt, 1 qt = 2 pt, 1 pt = 2 cup; 1 ton = 2000 lb. Waktu: 1 jam = 60 menit, 1 menit = 60 detik, 1 hari = 24 jam, 1 minggu = 7 hari. Satuan yang lebih kecil menghasilkan bilangan yang lebih besar.
Jawaban: x = 18,5 cm
Laju dan skala: kecepatan = jarak ÷ waktu, dengan waktu dalam satuan jawaban (2 jam 15 menit = 2,25 jam, karena 15 menit = 15/60 jam). Skala peta adalah proporsi: 1 cm pada peta mewakili jarak tetap di lapangan, jadi kalikan jarak pada peta dengan skala itu.
Jawaban: C · Serebelum (otak kecil)
Serebelum menyempurnakan gerakan, postur, dan keseimbangan. Kerusakannya menyebabkan ataksia dan cara berjalan yang goyah.
Jawaban: C · Saraf torakalis longus
Saraf torakalis longus mempersarafi serratus anterior, yang menahan skapula ke dinding dada. Kerusakannya menyebabkan winged scapula (skapula bersayap).
Jawaban: B · Glukagon merangsang pemecahan glikogen dan glukoneogenesis di hati
Glukagon dari sel alfa bekerja pada hati untuk memecah glikogen dan membuat glukosa baru dari sumber nonkarbohidrat.
Jawaban: A · Tumpang tindih aktin dan miosin berkurang, sehingga lebih sedikit jembatan silang terbentuk
Gaya maksimum terjadi pada panjang sarkomer optimal dengan tumpang tindih filamen terbaik. Regangan berlebihan mengurangi tumpang tindih; panjang yang terlalu pendek membuat filamen saling bertabrakan.
Jawaban: A · Moves 3 Na⁺ out and 2 K⁺ in, using ATP
Each cycle uses one ATP to pump 3 sodium ions out and 2 potassium ions in, both against their gradients. This keeps Na⁺ high outside and K⁺ high inside, which nerve and muscle cells need.
Jawaban: B · A comparable group that does not use the mouthwash
Without a control group, there is no way to know whether infections would have been just as rare without the mouthwash. A similar group under the same conditions is needed for comparison.
Jawaban: C · C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O
Combustion is a fuel reacting with O₂, here ethanol forming carbon dioxide and water. The others are neutralisation, decomposition and single replacement.
Jawaban: A · They are denatured: their shape changes, but the peptide bonds stay intact
Heat breaks the weak bonds (such as hydrogen bonds) that hold a protein's folded shape, so the chains unfold and tangle together. The covalent peptide bonds of the chain are not broken, so this is denaturation, not hydrolysis.
Jawaban: A · truly
“Truly” drops the e of “true” before -ly. Most words keep the e (sincerely, lovely), so it is a common spelling exception.
Jawaban: B · My brother, who lives in Ohio, is a nurse.
With commas the clause is nonessential: it adds a detail about the only brother. Without commas it is essential and suggests there are other brothers who live elsewhere. C and D use only one comma, which is incorrect.
Jawaban: D · Pass urine
To void means to urinate (empty the bladder).
Jawaban: C · Inflammation of the gallbladder
Cholecystitis is inflammation of the gallbladder, often caused by gallstones.
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