Gap junctions ____
a. seal the spaces between cells
b. allow ions and small molecules to pass between cells
c. allow plant cells to communicate with each other
d. give the cell its shape
e. anchor the cell membrane to the cell wall
B
You might also like to view...
Nutrient absorption mostly happens in the ____
a. stomach b. small intestine c. colon d. pancreas e. esophagus
Which of the following enzymes digests fats?
a. pepsin b. catalase c. amylase d. lipase e. trypsin
The first multicellular terrestrial organisms were
A) plants. B) amphibians. C) insects. D) fungi. E) reptiles.
Early geneticists wondered how only four nucleotides can specify the sequence of 20 amino acids in proteins. They hypothesized that there must be a code that linked the nucleotide sequence in a gene to the amino acid sequence in a protein. Each nucleotide code is called a codon. Today we know that there is a genetic code in which __________ nucleotide(s) code(s) for each amino acid.
A. 1 B. 3 C. 2 D. 4