ANSC 221 Quizzes with Complete
Solutions Graded A+
What is the difference between purines and pyrimidines? - Answer-Purines contain a
double ring backbone, while pyrimidines contain a single ring backbone.
Which of the following statements about the structure of DNA is incorrect? - Answer-
Each pair of nucleotides is held together by three hydrogen bonds
What functional role is the three dimensional structure of DNA likely to accomplish? -
Answer-Very long molecules of DNA can be packed into a small space.
The genetic material must be able to contain an infinite amount of information. -
Answer-False
Hydrogen bonding is the primary chemical bond holding a strand of DNA together. -
Answer-False
The backbones of the two DNA strands in a double helix run in opposite directions (one
5'-3' left to right, the other 5'-3' right to left). - Answer-True
Which statement is false? - Answer-RNA is always single stranded while DNA is always
double stranded.
What are the four interacting parts of eukaryotic cells? - Answer-nucleus, cytosol,
endomembrane system, semiautonomous organelles.
Which of the following is NOT true of the plasma membrane? - Answer-The extracellular
and intracellular layers or leaflets are highly symmetrical.
_________ of proteins is performed by _________ within the cytosol of eukaryotic cells.
- Answer-translation, ribosomes
Which would be the most accurate endomembrane route through which a protein is
secreted from a cell? - Answer-rough endoplasmic reticulum>>Golgi
apparatus>>vesicles>>plasma membrane
Solutions Graded A+
What is the difference between purines and pyrimidines? - Answer-Purines contain a
double ring backbone, while pyrimidines contain a single ring backbone.
Which of the following statements about the structure of DNA is incorrect? - Answer-
Each pair of nucleotides is held together by three hydrogen bonds
What functional role is the three dimensional structure of DNA likely to accomplish? -
Answer-Very long molecules of DNA can be packed into a small space.
The genetic material must be able to contain an infinite amount of information. -
Answer-False
Hydrogen bonding is the primary chemical bond holding a strand of DNA together. -
Answer-False
The backbones of the two DNA strands in a double helix run in opposite directions (one
5'-3' left to right, the other 5'-3' right to left). - Answer-True
Which statement is false? - Answer-RNA is always single stranded while DNA is always
double stranded.
What are the four interacting parts of eukaryotic cells? - Answer-nucleus, cytosol,
endomembrane system, semiautonomous organelles.
Which of the following is NOT true of the plasma membrane? - Answer-The extracellular
and intracellular layers or leaflets are highly symmetrical.
_________ of proteins is performed by _________ within the cytosol of eukaryotic cells.
- Answer-translation, ribosomes
Which would be the most accurate endomembrane route through which a protein is
secreted from a cell? - Answer-rough endoplasmic reticulum>>Golgi
apparatus>>vesicles>>plasma membrane
