Biology Ch. 5-7 Quiz

According to the fluid mosaic model of membrane structure, proteins of the membrane are mostly

embedded in a lipid bilayer.

Choose the fundamental characteristics of life.

to reproduce and pass along characteristics to offspring, to transform energy, to respond to the environment

Which of the following pairs of base sequences could form a short stretch of a normal double helix of DNADNA?

5′-ATGC-3′5′-ATGC-3′ with 5′-GCAT-3′

In what way do the membranes of a eukaryotic cell vary?

Certain proteins are unique to each membrane.

Suppose you are a research assistant in a lab studying DNA-binding proteins. You have been given the amino acid sequences of all the proteins encoded by the genome of a certain species and have been asked to find candidate proteins that could bind DNA. What type of amino acids would you expect to see in the DNA-binding regions of such proteins?

DNA has many phosphate groups along the backbone of each strand, so the molecule has many negative charges. Therefore, you might expect a DNA-binding protein to have many amino acids with positively charged side chains.

How does a cell display the fundamental characteristics of life?

It is possible because all the functions performed by the individual structures and organelles of a cell are integrated.

Why does the phenomenon called "life" appear only at the level of the cell and not at the level of an organelle or an even smaller level?

Not one of the cellular components could exist indefinitely on its own. Organelles should interact with each other to function properly.

Cyanide binds to at least one molecule involved in producing ATP. In a cell exposed to cyanide, most of the cyanide will be in

mitochondria.

Which of the following processes includes all the others?

passive transport

Which cell would be best for studying lysosomes?

phagocytic white blood cell