Through the Membrane
If you have no energy which process across the membrane will happen
Simple diffusion
Which of the following statements best describes the structure of complex carbohydrates?
Monosaccharides connected by covalent bonds
What does an enzyme do
It lowers the activation energy
What is the kind of bond that allows water to have cohesion to other molecules of water
Hydrogen
Which statement best describes what will happen in the absence of an aquaporin
Water will still move across the membrane but at a slower rate
Which of the following best describes the structures of carbohydrates?
They occur as monomers, chains of monomers, or branched structures
Which of the following statements best helps explain the reaction specificity of an enzyme?
The shape and charge of the substrates are compatible with the active site of the enzyme.
The NA+ and K+ Ion pump requires ATP to move ions from one membrane to the other. What role does ATP play in moving them across the membrane
Provides the energy for ions to move across the membrane
If 30% of the nucleotides in a single-stranded RNA molecule are adenine, then what percent are expected to be thymine?
0%
Define a non-competitive inhibitor.
A substrate that does not bind to the active site but changes the shape of it
Which of the following best explains why surface tension is created on the surface of bodies of water?
Water molecules are attracted to each other because the sharing of electrons between hydrogen and oxygen is unequal.
A substance moves across the membrane faster than it would by simple diffusion, but does not use energy what is currently happening
Facilitated Diffusion
Which of the following best describes how amino acids affect the tertiary structure of a protein?
The interactions between R groups and with the environment determine the tertiary structure of the protein
Wrong pH, wrong temperature, etc
Water is traveling up the xylem, what two characteristics are being used
Cohesion and Adhesion
An investigator wants to understand whether a newly found membrane protein is involved in membrane transport of a certain particle. Which investigation will help determine whether the new membrane protein is a channel protein involved in membrane transport?
Add more proteins to the plasma membrane and measure the rate of particle movement
A chemical binds to a protein composed of a single polypeptide chain and prevents the formation of an alpha helix that is typically formed in the absence of the chemical. Which of the following best describes the effect the chemical has on the structure of the protein?
The secondary structure will be affected
A researcher proposes a model to explain how enzyme-substrate interactions determine enzyme specificity. The model is based on the idea that substrate molecules form favorable interactions with the amino acid side chains in an enzyme’s active site.
Based on the model, which of the following statements best explains an enzyme’s specificity for a particular substrate molecule?
A molecule with negative charges interacts with positively charged side chains in the enzyme’s active site.
Humans produce sweat as a cooling mechanism to maintain a stable internal temperature. Which of the following best explains how the properties of water contribute to this physiological process?
The high heat of vaporization of water allows the body to remove excess heat through a phase change of water from liquid to gas.