Lembaran formula, langkah kaedah utama untuk setiap topik dan 16 soalan latihan, dengan penyelesaian penuh di bahagian belakang.
“Handwashing is the single most effective way to prevent the spread of infection in hospitals,” says a training manual. What would the manual most likely recommend next?
The author writes: “It is tempting to think that more vitamins are always better. Yet some vitamins, such as vitamin A, can build up in the body and become harmful in large doses.” What assumption does the author challenge?
Hitung 2/3 ÷ 1 1/2. Klik jawapan dalam bentuk termudah.
Dalam sesuatu kursus, kerja rumah dikira 30%, peperiksaan pertengahan 30% dan peperiksaan akhir 40% daripada gred. Seorang pelajar mendapat 87% dalam kerja rumah, 83% dalam peperiksaan pertengahan dan 67% dalam peperiksaan akhir. Berapakah gred kursus G? Bundarkan kepada satu tempat perpuluhan.
Injap manakah yang terletak antara atrium kiri dengan ventrikel kiri?
Seorang pesakit dengan aneurisme besar gerbang aorta mengalami suara serak. Saraf manakah yang paling mungkin tertekan?
Kumpulan darah ABO manakah yang mempunyai kedua-dua antibodi anti-A dan anti-B dalam plasma?
Perubahan manakah yang menganjakkan lengkung disosiasi oksigen–hemoglobin ke kanan?
A greenhouse is warm and brightly lit, but the air has very little carbon dioxide. What is most likely limiting the rate of photosynthesis?
A linear DNA molecule is fully cut by a restriction enzyme, giving fragments of 500, 300 and 200 base pairs. How long was the original molecule?
What is the formula of the hydroxide ion?
A sealed rigid can holds gas at 2 atm and 27 °C. It is heated to 327 °C. What is the new pressure?
Choose the correct word: “The tasks were divided ___ the five team members.”
Which revision fixes the comma splice by making one clause dependent? “The alarm sounded, the staff moved patients to safety.”
Choose the meaning of the word in bold: “The patient had a laceration on her scalp after the fall.”
Choose the meaning of the word in bold: “The patient’s condition began to deteriorate overnight.”
Jawapan: C · Washing hands before and after patient contact
If handwashing is the best way to prevent infection, the manual would likely recommend washing before and after each patient contact.
Jawapan: D · That taking more vitamins is always healthy
The author questions the belief that more vitamins are always better, pointing out that some can be harmful in excess.
Jawapan: 4/9
Mendarab dan membahagi pecahan: mula-mula tukarkan nombor bercampur kepada pecahan tak wajar (2 1/3 = 7/3). Untuk mendarab, darabkan pengangka dan penyebut. Untuk membahagi, kekalkan pecahan pertama, tukar ÷ kepada ×, dan terbalikkan pecahan kedua (darab dengan salingannya). Batalkan faktor sepunya dan tulis hasilnya dalam bentuk termudah sebagai nombor bercampur.
Jawapan: G = 77.8 %
Purata berwajaran: apabila bahagian dikira dengan peratusan yang berbeza, darabkan setiap skor dengan pemberatnya (sebagai perpuluhan) dan tambahkan. Min biasa bagi skor hanya betul apabila setiap bahagian dikira sama rata.
Jawapan: B · Injap mitral (bikuspid)
Injap mitral (bikuspid) memisahkan atrium kiri dan ventrikel kiri; injap trikuspid melakukan perkara yang sama di sebelah kanan.
Jawapan: B · Saraf laringeal berulang kiri
Saraf laringeal berulang kiri melingkar di bawah gerbang aorta bersebelahan ligamentum arteriosum. Ia membekalkan kebanyakan otot laring, jadi tekanan menyebabkan suara serak.
Jawapan: A · Kumpulan O
Orang kumpulan O tidak mempunyai antigen A atau B dan menghasilkan kedua-dua anti-A dan anti-B. Kumpulan AB mempunyai kedua-dua antigen dan tiada antibodi.
Jawapan: D · Suhu lebih tinggi
Suhu, CO₂, H⁺ (pH lebih rendah) dan 2,3-BPG yang lebih tinggi merendahkan afiniti hemoglobin dan menganjakkan lengkung ke kanan, melepaskan lebih banyak oksigen kepada tisu aktif.
Jawapan: C · The carbon dioxide concentration
When light and temperature are good, the factor in shortest supply limits the rate. Here it is CO₂, so adding CO₂ would speed up photosynthesis. Growers sometimes add CO₂ to greenhouses for this reason.
Jawapan: C · 1000 base pairs
The fragments together make up the whole molecule: 500 + 300 + 200 = 1000 base pairs. The three fragments also show that there were two cutting sites.
Jawapan: D · OH⁻
Hydroxide is OH⁻, one oxygen and one hydrogen with a 1− charge. H₃O⁺ is the hydronium ion found in acidic solutions.
Jawapan: B · 4 atm
27 °C = 300 K and 327 °C = 600 K. At constant volume, P/T is constant, so doubling the kelvin temperature doubles the pressure to 4 atm. Using Celsius would wrongly give about 24 atm.
Jawapan: C · among
Standard usage taught on entrance exams uses “between” for two people or things and “among” for three or more.
Jawapan: D · When the alarm sounded, the staff moved patients to safety.
B, C and D also fix the comma splice, but they keep both clauses independent. Only A adds the subordinating conjunction “when”, which makes the first clause dependent.
Jawapan: D · A torn or jagged cut
A laceration is a wound in which the skin is torn or cut, often with irregular edges.
Jawapan: C · Grow steadily worse
To deteriorate is to become progressively worse in condition or quality.
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