Test
B4 Quiz
Este test tiene tipos de pregunta que se abren en el reproductor de siempre.
Preguntas del test (22)
1Label the below image with the names of each process described.
- AMovement
- BRespiration
- CSensitivity
- DGrowth
- EReproduction
- FExcretion
- GNutrition
2Enzymes are [blank_start]proteins[blank_end] that speed up chemical reactions in our cells. Enzymes work best at their [blank_start]optimum[blank_end] temperature. This is why [blank_start]homeostasis[blank_end] is important - to keep our body temperature at a [blank_start]constant[blank_end] 37°C. As the temperature increases, so does the rate of chemical [blank_start]reaction[blank_end]. This is because heat energy causes more [blank_start]collisions[blank_end], with more energy, between the enzyme [blank_start]molecules[blank_end] and other molecules. However, if the temperature gets too high, the enzyme is [blank_start]denatured[blank_end] and stops working.
- Aoptimum
- Bproteins
- Chomeostasis
- Dconstant
- Ereaction
- Fcollisions
- Gmolecules
- Hdenatured
3Enzymes are specific. Only molecules with the correct shape can fit into the enzyme. Just like only one key can open a lock, only one type of enzyme can speed up a specific reaction.
- AVerdadero
- BFalso
4Which part of an enzyme is where specific molecules bind to the enzyme and the reaction occurs?
- AThe substrate
- BThe active site
- CThe denatured site
5What is an 'enzyme-substrate complex'?
- AWhen the substrate and the enzyme are attached. This is when the reaction happens and the bonds in the substrate are weakened.
- BWhat each enzyme is going to break down.
- CA biological catalyst that speeds up chemical reactions in the body.
6Anything that [blank_start]changes[blank_end] the shape of the active site stops the enzyme from working. This is similar to a key that opens a door lock. It does not matter what a key [blank_start]handle[blank_end] looks like, but if you change the shape of the ‘[blank_start]teeth[blank_end]’ the key no longer works.
The shape of the [blank_start]active site[blank_end] is affected by pH. This is why enzymes will only work at a specific [blank_start]pH[blank_end], as well as a specific [blank_start]temperature[blank_end]. Change the pH and the enzyme stops working. Increasing the temperature to 60°C will cause a [blank_start]permanent[blank_end] change to the shape of the active site. This is why enzymes [blank_start]stop[blank_end] working when they are heated. We say they have become [blank_start]denatured[blank_end].- Achanges
- Bhandle
- Cteeth
- Dactive site
- EpH
- Ftemperature
- Gpermanent
- Hstop
- Idenatured
7The word equation for photosynthesis is: Carbon dioxide + water (+light energy) --> glucose + oxygen
What is the corresponding balanced symbol equation?- A6CO2 + 6H2O (+light energy) --> C6H12O6 + 6O2
- BCO2 + H2O (+light energy) --> C6H12O6 + O2
- CC6H12O6 + 6O2 --> 6CO2 + 6H2O (+light energy)
8Glucose made by photosynthesis can be used in three ways. What are they?
- AIt can be converted into chemicals required for growth of plant cells such as cellulose.
- BIt can be converted into starch, a storage molecule, that can be converted back to glucose when the plant requires it.
- CIt can be broken down during the process of respiration, releasing energy stored in the glucose molecules.
- DIt can be released through the stomata.
- EIt builds up as lactic acid.
9Which three factors limit the rate of photosynthesis?
- Alight intensity
- Bconcentration of carbon dioxide
- Cconcentration of oxygen
- DpH
- Etemperature
10What is the primary function of a cell's nucleus?
- Acontaining DNA carrying the genetic code for enzymes and other proteins used in photosynthesis
- Bcontaining chlorophyll and enzymes needed for reactions in photosynthesis.
- Ccontaining cell sap to keep the cell turgid
11[blank_start]Diffusion[blank_end] occurs when particles spread. They move from a region where they are in [blank_start]high[blank_end] concentration to a region where they are in [blank_start]low[blank_end] concentration. Diffusion happens when the particles are free to [blank_start]move[blank_end]. This is true in gases and for particles dissolved in [blank_start]solutions[blank_end]. Particles diffuse down a concentration [blank_start]gradient[blank_end], from an area of high concentration to an area of low concentration.
The movement of oxygen and [blank_start]carbon dioxide[blank_end] in and out of leaves during [blank_start]photosynthesis[blank_end] occurs by diffusion. The higher concentration of carbon dioxide in the air diffuses [blank_start]into[blank_end] the leaf for photosynthesis. Oxygen produced during photosynthesis [blank_start]builds[blank_end] up to higher concentrations and diffuses [blank_start]out[blank_end] of the leaf into the air which has a lower concentration of [blank_start]oxygen[blank_end].- ADiffusion
- Bhigh
- Clow
- Dmove
- Esolutions
- Fgradient
- Gcarbon dioxide
- Hphotosynthesis
- Iinto
- Jbuilds
- Kout
- Loxygen
12The steeper the concentration gradient, the faster the rate of diffusion.
- AVerdadero
- BFalso
13Osmosis is important to [blank_start]plants[blank_end]. They gain water by osmosis through their [blank_start]roots[blank_end]. Water moves into plant cells by [blank_start]osmosis[blank_end], making them [blank_start]turgid[blank_end] or stiff so they that able to hold the plant [blank_start]upright[blank_end].
- Aplants
- Broots
- Cosmosis
- Dturgid
- Eupright
14Osmosis is the movement of water from a more concentrated solution to a less concentrated solution through a partially permeable membrane.
- AVerdadero
- BFalso
15The concentration of minerals in the soil is very [blank_start]low[blank_end]. They dissolve in water and move around the soil in [blank_start]solution[blank_end]. Root hair cells are [blank_start]adapted[blank_end] to absorb the water out of soil by [blank_start]osmosis[blank_end] – they have a large surface area, thin walls and are close to the [blank_start]xylem[blank_end] cells used for transporting water up the plant. Minerals such as [blank_start]nitrate[blank_end] ions cannot be absorbed by osmosis (which is the [blank_start]movement[blank_end] of water only) or diffusion (because the minerals are in very low [blank_start]concentration[blank_end]). The root hair cells have [blank_start]carrier[blank_end] molecules on their surface that pick up the [blank_start]minerals[blank_end] and move them into the cell against the concentration [blank_start]gradient[blank_end]. This requires [blank_start]energy[blank_end], and is called [blank_start]active[blank_end] transport.
- Alow
- Bsolution
- Cadapted
- Dosmosis
- Exylem
- Fnitrate
- Gmovement
- Hconcentration
- Icarrier
- Jminerals
- Kgradient
- Lenergy
- Mactive
16A [blank_start]quadrat[blank_end] can be used to survey the plants present in a square metre.
The quadrat is a square [blank_start]grid[blank_end] that is placed on the ground. Any plants or [blank_start]animals[blank_end] present within the area of the quadrat are recorded. The [blank_start]organisms[blank_end] can be named using an [blank_start]identification[blank_end] key that provides pictures and/or [blank_start]descriptions[blank_end] of the organisms.
Quadrats are positioned [blank_start]randomly[blank_end] to remove bias and allow for reliable [blank_start]comparison[blank_end] between locations.
If appropriate, data may be recorded at regular intervals along a [blank_start]transect[blank_end]. A transect is a straight line that runs through a location upon which data on organism [blank_start]distribution[blank_end] can be recorded. An identification key can then be used to [blank_start]identify[blank_end] species present, so a link may be formed between [blank_start]light[blank_end] level and species present.- Aquadrat
- Bgrid
- Canimals
- Dorganisms
- Eidentification
- Fdescriptions
- Grandomly
- Hcomparison
- Itransect
- Jdistribution
- Kidentify
- Llight
17Respiration that uses oxygen is called...
- Aaerobic respiration
- Banaerobic respiration
18The symbol equation for aerobic respiration is C6H12O6 + 6O2 → 6CO2 + 6H2O
- AVerdadero
- BFalso
19Where does respiration occur?
- AIn the lungs
- BIn the mitochondria of all cells
- CIn the nucleus of all cells
20Lactic acid is produced by anaerobic respiration in yeast.
- AVerdadero
- BFalso
21Why is anaerobic respiration not used all the time in animals?
- Ait gives out less energy per gram of glucose than aerobic respiration
- Bit causes a buildup of poisonous lactic acid
- Cit is slower
- Dit means the cells have to work harder
22Oxygen debt is the amount of oxygen needed to clear out the lactic acid in our muscles with the equation:
lactic acid + oxygen --> water + carbon dioxide- AVerdadero
- BFalso
Información
- Descripción
- GCSE (B4 - The Processes of Life) Biology Test sobre B4 Quiz, creado por Leah Firmstone el 24/11/2015.
- Autor
- Leah Firmstone
- Idioma
- English
- Visitas
- 16
- Etiquetas
- Valoración
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