1、of the elements below, two are much more abundant in earth's crust than in living organisms. what are these two elements? a、iron b、oxygen c、hydrogen d、nitrogen
第2章 分子的构型随堂测验
1、what is the most appropriate definition of conformation? a、the chemical formula of a molecule b、the fixed arrangement of atoms dictated by the bonds of a molecule c、the three dimensional structure a molecule is most likely to adopt, given its chemical formula d、the (potentially flexible) spatial arrangement of atoms around fixed bonds in a molecule
第3章 能量流动随堂测验
1、the following reaction: s⟶p has a δg of -10 kj/mol. the reaction is: a、spontaneous b、nonspontaneous c、at equilibrium d、no reaction
2、the following reaction: s⟶p has a δh of -10 kj/mol, and the product of tδs is 15 kj/mol. the reaction is: a、spontaneous b、nonspontaneous c、at equilibrium d、no reaction
单元测验
1、what is the most appropriate definition of conformation? a、the chemical formula of a molecule b、the fixed arrangement of atoms dictated by the bonds of a molecule c、the three dimensional structure a molecule is most likely to adopt, given its chemical formula d、the (potentially flexible) spatial arrangement of atoms around fixed bonds in a molecule
2、the following reaction: s⟶p has a δg of -10 kj/mol. the reaction is: a、spontaneous b、nonspontaneous c、at equilibrium d、no reaction
3、of the elements below, two are much more abundant in earth's crust than in living organisms. what are these two elements? a、iron b、oxygen c、hydrogen d、nitrogen
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第二部分 结构生物化学
第1章 碳水化合物的结构随堂测验
1、which two of the following are chemical characteristics of monosaccharides? a、they contain multiple hydroxyl groups. b、they contain an aldehyde or ketone group. c、they contain a branching carbon backbone. d、every carbon in a monosaccharide is fully reduced.
第1章 碳水化合物的结构随堂测验
1、which two of the following are monosaccharides? a、ribose b、glycine c、glucose d、glycogen
第1章 碳水化合物的结构随堂测验
1、 which of the following carbons is a chiral center? a、c1 b、c2 c、c3 d、c4
第2章 氨基酸-肽-蛋白质随堂测验
1、the non-covalent intermolecular forces described in this video behave differently. how are the forces ranked in terms of their energy? a、van der waals > ionic > hydrogen bonds b、ionic > van der waals > hydrogen bonds c、ionic > hydrogen bonds > van der waals d、hydrogen bonds > ionic > van der waals
第2章 氨基酸-肽-蛋白质随堂测验
1、in a ramachandran plot, what do all of the shaded areas represent? a、the most common combinations of bond angles in proteins b、angles that cause the formation of beta sheets c、angles that cause the formation of alpha helices d、areas of steric clash between the r groups of adjacent amino acids
第2章 氨基酸-肽-蛋白质随堂测验
1、why does proline often “break” an alpha helix? a、it cannot adopt the psi and phi angles required to form an alpha helix. b、it often adopts the trans conformation, unlike the other amino acids. c、it flips between the cis and trans conformations frequently. d、it has no free hydrogen to bond with a carbonyl because of the imino ring.
单元测验
1、the non-covalent intermolecular forces described in this video behave differently. how are the forces ranked in terms of their energy? a、van der waals > ionic > hydrogen bonds b、ionic > van der waals > hydrogen bonds c、ionic > hydrogen bonds > van der waals d、hydrogen bonds > ionic > van der waals
2、in a ramachandran plot, what do all of the shaded areas represent? a、the most common combinations of bond angles in proteins b、angles that cause the formation of beta sheets c、angles that cause the formation of alpha helices d、areas of steric clash between the r groups of adjacent amino acids
3、why does proline often “break” an alpha helix? a、it cannot adopt the psi and phi angles required to form an alpha helix. b、often adopts the trans conformation, unlike the other amino acids. c、it flips between the cis and trans conformations frequently. d、it has no free hydrogen to bond with a carbonyl because of the imino ring
4、which statement correctly describes the structure of lipids? a、lipids enclose the aqueous cytosol of an animal cell in a monolayer b、lipids are formed by addition of repeating subunits into a polymer c、lipids all have a large hydrophobic region d、most lipids contain peptide bonds
5、glycerol can form triacylglycerol when.. a、three glycerol molecules react with one another b、the acyl groups cyclize to form a multi-ring structure c、each ester linkage is replaced with a phosphodiester linkage d、a fatty acid is esterified to each hydroxyl group of glycerol
6、what is the main function of triacylglycerol in animal cells? a、compartmentalize organelles b、store energy for the short term c、store energy for the short term d、maintain plasma membrane fluidity
7、which two of the following are chemical characteristics of monosaccharides? a、they contain multiple hydroxyl groups b、they contain an aldehyde or ketone group c、they contain a branching carbon backbone d、every carbon in a monosaccharide is fully reduced
8、which two of the following are monosaccharides? a、ribose b、glycine c、glucose d、glycogen
69、what is the most appropriate definition of conformation? a、the chemical formula of a molecule b、the fixed arrangement of atoms dictated by the bonds of a molecule c、the three dimensional structure a molecule is most likely to adopt, given its chemical formula d、the (potentially flexible) spatial arrangement of atoms around fixed bonds in a molecule
70、the non-covalent intermolecular forces described in this video behave differently. how are the forces ranked in terms of their energy? a、van der waals > ionic > hydrogen bonds b、ionic > van der waals > hydrogen bonds c、ionic > hydrogen bonds > van der waals d、hydrogen bonds > ionic > van der waals
71、of the elements below, two are much more abundant in earth's crust than in living organisms. what are these two elements? a、iron b、oxygen c、hydrogen d、nitrogen
72、which two of the following are monosaccharides? a、ribose b、glycine c、glucose d、glycogen
73、在缺氧条件下,丙酮酸还原为乳酸的意义是使nad 再生。
74、无氧条件下,糖酵解途径中脱氢反应产生的nadh h 交给丙酮酸生成乳酸,有氧条件下,nadh h 则进入线粒体氧化。
69、what is the most appropriate definition of conformation? a、the chemical formula of a molecule b、the fixed arrangement of atoms dictated by the bonds of a molecule c、the three dimensional structure a molecule is most likely to adopt, given its chemical formula d、the (potentially flexible) spatial arrangement of atoms around fixed bonds in a molecule
70、the non-covalent intermolecular forces described in this video behave differently. how are the forces ranked in terms of their energy? a、van der waals > ionic > hydrogen bonds b、ionic > van der waals > hydrogen bonds c、ionic > hydrogen bonds > van der waals d、hydrogen bonds > ionic > van der waals
71、of the elements below, two are much more abundant in earth's crust than in living organisms. what are these two elements? a、iron b、oxygen c、hydrogen d、nitrogen
72、which two of the following are monosaccharides? a、ribose b、glycine c、glucose d、glycogen
73、在缺氧条件下,丙酮酸还原为乳酸的意义是使nad 再生。
74、无氧条件下,糖酵解途径中脱氢反应产生的nadh h 交给丙酮酸生成乳酸,有氧条件下,nadh h 则进入线粒体氧化。