Enzymes

Descripción

(Enzymes) Biology Test sobre Enzymes, creado por Daniel Brand el 28/02/2017.
Daniel Brand
Test por Daniel Brand, actualizado hace más de 1 año
Daniel Brand
Creado por Daniel Brand hace más de 7 años
3369
0

Resumen del Recurso

Pregunta 1

Pregunta
Which of the following statements correctly relates to enzymes? Check all that apply.
Respuesta
  • They are biological catalysts.
  • They are used up during reactions.
  • They are effective in small amounts.
  • They are found exclusively inside cells.

Pregunta 2

Pregunta
Unlike [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.
Respuesta
  • chemical
  • biological
  • gastrointestinal
  • gaseous
  • extreme
  • mild
  • pH
  • osmotic pressures
  • by-catalysts
  • dilution
  • don't
  • do
  • usually
  • specific
  • acidic
  • uncommon
  • insoluble

Pregunta 3

Pregunta
Metabolic substrates and products sometimes regulate the activity of enzymes in their own and other metabolic pathways.
Respuesta
  • True
  • False

Pregunta 4

Pregunta
[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.
Respuesta
  • rypsin
  • Amylase
  • Catalase
  • hydrogen
  • peroxide
  • water
  • pancreas
  • small
  • intestine
  • starch

Pregunta 5

Pregunta
Enzymes 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.
Respuesta
  • active
  • charged
  • tertiary
  • specific
  • 6-10
  • 2-4
  • 60-100
  • 150-200
  • tertiary
  • primary
  • secondary
  • quaternary
  • complementary
  • reduced
  • synthesised
  • primary
  • specific
  • non-specific
  • an oxidising agent
  • a reducing agent
  • cofactors
  • vitamins
  • active sites
  • polypeptides

Pregunta 6

Pregunta
ESC stands for [blank_start]enzyme[blank_end] [blank_start]substrate[blank_end] [blank_start]complex[blank_end].
Respuesta
  • enzyme
  • substrate
  • complex

Pregunta 7

Pregunta
Which of the following statements are TRUE about enzyme action?
Respuesta
  • Enzyme-substrate collisions are random.
  • Enzyme-substrate collisions happen less frequently when heat/kinetic energy is high.
  • Enzyme active site and substrate are specific and complementary.
  • The ESC is usually held together by covalent bonds.
  • Substrate(s) is/are broken down or combined while in the ESC.

Pregunta 8

Pregunta
The ESC is unstable, holding more energy than the substrate(s), which in turn holds more energy than the product(s).
Respuesta
  • True
  • False

Pregunta 9

Pregunta
According 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.
Respuesta
  • induced
  • lock and key
  • active site
  • solubility
  • pH
  • tertiary
  • primary
  • secondary
  • quaternary
  • bonds
  • polypeptides
  • enzymes
  • the lock-and-key
Mostrar resumen completo Ocultar resumen completo

Similar

Biological Definitions
Yamminnnn
Biology- Genes, Chromosomes and DNA
Laura Perry
Biology- Genes and Variation
Laura Perry
GCSE AQA Biology - Unit 2
James Jolliffe
GCSE Biology AQA
isabellabeaumont
GCSE Biology B2 (OCR)
Usman Rauf
Biology Unit 2 - DNA, meiosis, mitosis, cell cycle
DauntlessAlpha
Biological Molecules Definitions
siobhan.quirk
Cells And Cell Techniques - Flashcards (AQA AS-Level Biology)
Henry Kitchen
Cell Structure
megan.radcliffe16
GCSE Biology - Homeostasis and Classification Flashcards
Beth Coiley