举一反三
- A covalent bond is a chemical bond in which two or more electrons are shared by two atoms.
- The chemical bond that causes silicon atoms to combine into crystals is called an ioninc bond
- The covalent bond between two adjacent amino acids in a protein chain is called a ___________; the chain of amino acids is also known as a polypeptide.
- The primary structure of protein is primarily maintained by A: peptide bond B: hydrogen bond C: ionic bond D: hydrophobic bond E: covalent bond
- In organic compounds, single bond is σ bond, only one of double bond and three bond is σ bond, the rest is π bond.
内容
- 0
The reaction catalyzed by lysozyme is a ____________: the enzyme adds a molecule of water to a single bond between two adjacent sugar groups in the polysaccharide chain, thereby causing the bond to break.
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Saturated fats contain how many double bonds? A: Zero B: Single double bond C: More than one double bond D: Two double bonds
- 2
a bond offers an annual coupon rate of 4%, with interest paid semiannually. The bond matures in two years. At a market discount rate of 6%, the price of this bond per 100 of par value is closest to
- 3
If you have a bond that pays a lump sum at the time of maturity, it is A: called a zero-coupon bond. B: worth more than a bond with coupon payments. C: riskier than a bond with coupon payments. D: a safer investment than a perpetuity.
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_________ is a bond secured by a mortgage on one or more assets. A: A convertible bond B: A treasury bond C: A mortgage bond D: A municipal bond