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Which element makes up the largest share of the human body by mass?

1. ANitrogen
2. BHydrogen
3. CCarbon
4. DOxygen

What are the building blocks (monomers) of proteins?

1. AAmino acids
2. BFatty acids
3. CSimple sugars
4. DNucleotides

Where are the metalloids found on the periodic table?

1. AIn the two separate rows at the bottom of the table
2. BIn group 1, at the far left edge of the table
3. CIn group 18, at the far right edge of the table
4. DAlong the staircase line between the metals and the nonmetals

A patient's arterial blood pH is 7,25. How is this described?

1. ANeutral
2. BAcidosis
3. CNormal
4. DAlkalosis

Bagaimana susunan elektron atom natrium (11 elektron)?

1. A2, 8, 2
2. B2, 8, 1
3. C8, 2, 1
4. D2, 9

What is the conjugate base of nitric acid, HNO₃?

1. ANO₃⁻
2. BNO₂⁻
3. CHNO₂
4. DH₂NO₃⁺

Darah dijaga mendekati pH 7,4 oleh larutan penyangga. Jika asam berlebih (H⁺) masuk ke darah, apa yang dilakukan ion bikarbonat (HCO₃⁻)?

1. AMenaikkan pH menjadi 14
2. BMengikat H⁺ sebagai asam karbonat, sehingga pH hanya turun sedikit
3. CMelepaskan lebih banyak ion H⁺ miliknya, membuat darah makin asam
4. DBerubah menjadi natrium klorida

J.J. Thomson's cathode ray experiments led to which discovery?

1. AAtoms contain small, negatively charged particles
2. BThe nucleus contains uncharged neutrons
3. CElectrons occupy fixed energy levels
4. DAtoms have a dense, positively charged nucleus