0
Enzymes have an active site that is specific for a substrate - therefore enzymes only work when the right substrate is present.
The surfaces of the enzyme and the substrate fit together - like a lock and key - allowing the enzyme to fulfil its function.
The theory of "induced fit" is more widely accepted - it is similar, but the enzyme shape changes to accommodate the substrate.
Wiki User
∙ 7y ago
Add your answer:
Earn +20 pts
What do enzymes and substrates look like?
Enzymes and substrates are molecules and look like any other molecules. In case of enzymes specifically, they are proteins and so have long chains of amino acids folded into different structures and shapes.
Which substances fit together like a lock and key?
enzymes and substrates
What are the rectants in the equation of cellular respiration?
Respiratory substrates like carb., proteins or fats and oxygen in a living cell containing several enzymes in cytoplasm and mitochondria.
Why are enzymes said to be specific?
Enzymes are highly specific in their action. For example, enzyme maltase acts on sugar maltose and not on lactose or sucrose. Different enzymes may act on the same substrate but give rise to different products. For example, raffinose gives rise to melibiose and fructose in the presnce of enzyme sucrase while in the presence of enzyme melibiase it produces lactose and sucrose. Similarly an enzyme may act on different substrates like sucrase can act on both sucrose and raffinose producing different end products.
Why do enzymes only work with the specific substrates?
Enzymes act only on a specific substrate due to the active site of the enzymes fits perfectly with the substrate. Like 2 puzzle pieces, they can only go together and not with anything else. Enzymes catalyze or help a reaction take place. They bind substrates and then help position them in order that the chemical reaction between these substrates can take place. If they bound things other than the substrates they would be much less efficient in catalyzing the reactions.
How are substrates like keys and enzymes like locks a bad analogy?
Well, it is just a representation, substrates are normally smaller molecules, and enzymes are in huge size hence they used this analogy!
What do enzymes and substrates look like?
Enzymes and substrates are molecules and look like any other molecules. In case of enzymes specifically, they are proteins and so have long chains of amino acids folded into different structures and shapes.
Which substances fit together like a lock and key?
enzymes and substrates
Why enzymes are so particular about reactions?
Enzymes are complex molecules with intricate structure. It may help to think of them as being somewhat like keys: a key only opens the locks it fits, and enzymes only catalyze reactions where the molecule fits properly with the enzyme's active site.
What object has keys that opens no locks space but no room?
Sounds like a keyboard.
What are the rectants in the equation of cellular respiration?
Respiratory substrates like carb., proteins or fats and oxygen in a living cell containing several enzymes in cytoplasm and mitochondria.
How does the interactions between a carrier protein and the substance it transports resembles the interaction between an enzyme and it's substrate?
Carrier proteins transports specific molecules just as enzymes will only react to specific substrates. Molecules will only bind to their respective receptors. It can be thought of sort of like a puzzle piece, which will only fit into its correct place. Enzymes and substrates also function in this matter.
What is key and lock theory?
It is when the enzyme (lock) fits exactly into the substrate (key) forming an enzyme substrate complex. It refers to enzymes and their substrates. The enzyme has an active site (lock) where the substrate that is complemetary fits in (key). Only substrates that fit perfectly into the enzymes active site will active the particular reaction, just like only 1 specific key will open a door.
How does the lock and key help analogy explain enzymes?
just like keys will open a particular lock, enzymes will catalyse only a particular reaction.
Why do we need house keys?
To lock and unlock the house locks that keep burglars and strangers from entering your house anytime they feel like.
Do enzymes change shape to move substances across the plasma membrane?
Enzymes and the substrates they work on fit like a lock and key, if you change the shape of the key, the lock won't open. An enzyme whose shape changes is no longer able to activate the reaction of the substrate.
What do enzymes have to help them fit their substrates the molecules that attach to the enzymes?
They actually bind to a substrate as the term reactant is usually used in chemistry. They fit into what we call an active site just like a key will fit into a lock. The key must be the correct key or the reaction will not occur. So the enzyme is said to be specific for that substrate.
