Cell Membrane Functions and Proteins

  Which molecule plays a key role in protein synthesis by transporting amino acids to the ribosome?

• DNA

• mRNA

• tRNA

• rRNA

   The primary function of the cell membrane is to

• Produce energy

• Control the passage of substances in and out of the cell

• Synthesize proteins

• Store genetic information

  Channel proteins in the cell membrane are responsible for:

• DNA replication

• Facilitating the passage of molecules across the membrane

• Producing ATP

•        Providing structural support

1)        Cholesterol in the cell membrane helps to:

• Transport nutrients

• Maintain fluidity

• Replicate DNA

• Synthesize proteins

     The anticodon is a component of:

• mRNA

• tRNA

• rRNA

• DNA

During elongation in transcription, RNA polymerase:

• Unwinds the DNA double helix

• Synthesizes a complementary mRNA strand

• Binds to the promoter region

• Adds a poly-A tail to the mRNA

The coding strand in DNA is

• The strand that serves as a template for mRNA synthesis

• The strand that is complementary to the template strand

• The strand that contains the anticodon

• The strand that is replicated during cell division

In the elongation stage of translation, the ribosome

• Initiates protein synthesis

• Elongates the polypeptide chain by adding amino acids

• Terminates protein synthesis

• Unwinds the DNA double helix

The G1 phase of the cell cycle is important because

• DNA is replicated

• The cell prepares for mitosis

• The cell grows and carries out normal functions

• Chromosomes are aligned at the metaphase plate

The G2 phase of the cell cycle is characterized by

• DNA replication

• Chromosome alignment

• Cell growth and preparation for mitosis

• Cytokinesis