Cancer and Enzymes Assignment Assignment

During a chemical reaction, the incoming molecule that interacts with an enzyme is called the

substrate.

The reactants of a chemical reaction, which interact with an enzyme at its active site, can also be referred to as

substrates.

Most human enzymes function best at temperatures very close to ______ degrees Celsius.

37

Most human enzymes function best at a pH very close to

7.4

What is a biochemical pathway?

A series of enzymes linked together such that the product of one enzyme is the reactant for the next enzyme until the final product is produced.

An incoming substrate and an enzyme interact at a location on the enzyme called the ________ _________.

Blank 1: active Blank 2: site

The_______ ________ of an enzyme determines what molecules they will interact with.

Blank 1: active Blank 2: site or sites

Which of the following is something an enzyme can do in a chemical reaction?

Help one substrate split into two products when it binds at the enzyme's active site. Help two substrates become a single product when they bind at its active site.

Which of these describes the relationship between products and substrates in biochemical pathways?

The product of one enzyme becomes the substrate of the next.

What is it about an enzyme that makes it react only with certain molecules (substrates)?

The specific shape of the enzyme.

Which of these is true concerning enzymes?

Their activity is influenced by temperature. They function best under very specific conditions.

Which of the following accurately describes the role of enzymes in cells?

They can make chemical reactions more efficient. They are like workers: they participate in chemical processes but are not part of the products. They are proteins that interact with specific molecules in the cell.

What is the role of an enzyme in a cellular process?

To bind to specific substrates in a chemical reaction and to make the reaction more efficient.

The assembly-line linkage between a series of enzymes in a cell is called

a biochemical pathway.

Some drugs, including some used to treat cancer, bind enzymes at their_______ site, and then the usual substrates cannot.

active

The location on an enzyme that reacts with an incoming substrate is called its

active site

Where would a cancer drug bind an enzyme to change its normal function?

at the active site

It is important for the human body to maintain specific conditions because ______ are optimized to perform within a narrow range of temperature and pH.

enzymes

The substrate of a chemical reaction is best defined as the

incoming molecule, which interacts with the enzyme during a chemical reaction.

Maintaining which of these conditions within a narrow limit is important for enzyme function?

pH temperature

The output of a chemical reaction is called the

product.

In a biochemical pathway, a ______ is converted into a ______ by the first enzyme in the pathway. That ______ becomes the ______ for the next enzyme in the pathway and this pattern continues until the final enzyme in the pathway.

reactant; product product; reactant

The ______ of an enzyme determines what type of molecules it will interact with.

shape

The product of a chemical reaction is best defined as

the output of the reaction.