Which of the following can cross a biological membrane by simple diffusion?

a. Glucose
b. Fatty acid
c. Amino acid
d. Protein


Ans: b. Fatty acid

Biology & Microbiology

You might also like to view...

Phagocytes were first discovered and named by

A. Pasteur. B. Koch. C. Lister. D. Metchnikoff.

Biology & Microbiology

The development of a body plan with differentiated cells is achieved by ________

a. repression of mRNA translation b. expression of different genes in different embryonic cells c. absorption of specific proteins and enzymes d. suppression of proteolytic enzymes

Biology & Microbiology

During a sequencing reaction, the researcher adds all the required components to the reaction, but

accidentally adds only one of the four dideoxynucleotides, the ddC. What kinds of products will be observed after this reaction is complete?

a. All fragments will end in A. b. All fragments will end in C. c. All fragments will end in G. d. All fragments will end in T. e. No fragments will be made.

Biology & Microbiology

All of the following are types of light microscopes EXCEPT

A) fluorescent. B) confocal. C) phase-contrast. D) scanning tunneling. E) bright-field.

Biology & Microbiology