Quiz
Enzymes
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Perguntas do quiz (9)
1Which of the following statements correctly relates to enzymes? Check all that apply.
- AThey are biological catalysts.
- BThey are used up during reactions.
- CThey are effective in small amounts.
- DThey are found exclusively inside cells.
2Unlike [blank_start]chemical[blank_end] catalysts, enzymes do not require [blank_start]extreme[blank_end] temperatures or [blank_start]pH[blank_end] to function efficiently. Also, they [blank_start]don't[blank_end] produce by-products, are highly [blank_start]specific[blank_end], and their activity can be regulated by cells.
- Achemical
- Bbiological
- Cgastrointestinal
- Dgaseous
- Eextreme
- Fmild
- GpH
- Hosmotic pressures
- Iby-catalysts
- Jdilution
- Kdon't
- Ldo
- Musually
- Nspecific
- Oacidic
- Puncommon
- Qinsoluble
3Metabolic substrates and products sometimes regulate the activity of enzymes in their own and other metabolic pathways.
- AVerdadeiro
- BFalso
4[blank_start]Catalase[blank_end] is an example of a four-polypeptide intracellular enzyme. It breaks down [blank_start]hydrogen[blank_end] [blank_start]peroxide[blank_end] into oxygen and [blank_start]water[blank_end]. [blank_start]Amylase[blank_end] is an extracellular enzyme produced by the [blank_start]pancreas[blank_end] and released into the [blank_start]small[blank_end] [blank_start]intestine[blank_end]. It breaks down [blank_start]starch[blank_end] into maltose. Similarly, t[blank_start]rypsin[blank_end] breaks down proteins into peptides.
- Arypsin
- BAmylase
- CCatalase
- Dhydrogen
- Eperoxide
- Fwater
- Gpancreas
- Hsmall
- Iintestine
- Jstarch
5Enzymes bind to their substrate at their [blank_start]active[blank_end] site. This consists of [blank_start]6-10[blank_end] amino acids that form a [blank_start]tertiary[blank_end] structure which is [blank_start]complementary[blank_end] and [blank_start]specific[blank_end] to the substrate.
The role of [blank_start]cofactors[blank_end] is to ensure that enzymes act at the appropriate rate.- Aactive
- Bcharged
- Ctertiary
- Dspecific
- E6-10
- F2-4
- G60-100
- H150-200
- Itertiary
- Jprimary
- Ksecondary
- Lquaternary
- Mcomplementary
- Nreduced
- Osynthesised
- Pprimary
- Qspecific
- Rnon-specific
- San oxidising agent
- Ta reducing agent
- Ucofactors
- Vvitamins
- Wactive sites
- Xpolypeptides
6ESC stands for [blank_start]enzyme[blank_end] [blank_start]substrate[blank_end] [blank_start]complex[blank_end].
- Aenzyme
- Bsubstrate
- Ccomplex
7Which of the following statements are TRUE about enzyme action?
- AEnzyme-substrate collisions are random.
- BEnzyme-substrate collisions happen less frequently when heat/kinetic energy is high.
- CEnzyme active site and substrate are specific and complementary.
- DThe ESC is usually held together by covalent bonds.
- ESubstrate(s) is/are broken down or combined while in the ESC.
8The ESC is unstable, holding more energy than the substrate(s), which in turn holds more energy than the product(s).
- AVerdadeiro
- BFalso
9According to the [blank_start]induced[blank_end] fit hypothesis, formation of the ESC creates subtle changes in the [blank_start]active site[blank_end] [blank_start]tertiary[blank_end] structure, which allows [blank_start]bonds[blank_end] to break and form during the biological reaction.
- Ainduced
- Block and key
- Cactive site
- Dsolubility
- EpH
- Ftertiary
- Gprimary
- Hsecondary
- Iquaternary
- Jbonds
- Kpolypeptides
- Lenzymes
- Mthe lock-and-key
Informações
- Descrição
- Biology (Enzymes) Quiz sobre Enzymes, criado por Daniel Brand em 28-02-2017.
- Autor
- Daniel Brand
- Idioma
- English
- Visualizações
- 3.379
- Etiquetas
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