Exam 2: The Cell: Structure and Function

Which of the following processes is NOT a post- translational modification that occurs in the endoplasmic reticulum or Golgi apparatus to make proteins functional?

Guanine and cytosine are held together by two hydrogen bonds.

Sucrose is a disaccharide composed of a glucose and a lactose molecule.

Each amino acid differs from others only by the

are molecules that are composed of one or more phosphate groups, a 5- carbon sugar, and a nitrogenous base.

Which of the following organelles contains its own DNA?

The codon is

The protein is responsible for generating force as microtubular proteins in cilia slide past one another.

are molecules that form the bilayer of cell membranes and micelles.

are modified fatty acids that function in intercellular communication and include prostaglandins and thromboxanes.

The mitotic spindle forms from the centrosome during cell division.

Proteases break peptide bonds.

Which cellular protein is found in gap junctions?

Within the nucleus, chromosomes are coiled around which proteins?

Certain epithelial cells have a decided polarity where the membrane faces the lumen of a hollow tube, whereas the membrane faces the extracellular fluid.

The is the site of ribosomal RNA production.

Cyclic nucleotides form ring structures due to the covalent bonding between an oxygen of the phosphate group and a carbon of the carbohydrate.

The presence of in the plasma membrane can inhibit crystallization.

The exon is cut from the original mRNA sequence, leaving the intron as the portion of mRNA that leaves the nucleus to be translated into a protein.

Which of the following is/are found in DNA but not RNA?