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Questions in this quiz (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.
- ATrue
- BFalse
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.
- ATrue
- BFalse
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.
- ATrue
- BFalse
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
- ATrue
- BFalse
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.
- ATrue
- BFalse
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- ATrue
- BFalse
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- GCSE Biology (B4 - The Processes of Life) Quiz on B4 Quiz, created by Leah Firmstone on 24/11/2015.
- Author
- Leah Firmstone
- Language
- English
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