. Which of the following statements about the flow of genetic information is correct? A. Translation occurs prior to transcription during protein synthesis. B. During translation, the DNA template is converted to amino acids by the ribosomes. C. During transcription, the DNA template is converted to an RNA molecule by the enzyme RNA polymerase. D. Eukaryotic mRNA needs to be transported to the cytoplasm before the protein products are synthesized. 2. What is the main difference in the cell wall composition between eukaryotes and prokaryotes?
Structure and Composition of Cell Membrane
Despite differences in structure and function, all living cells in multicellular organisms are surrounded by a cell membrane. Just like the outer layer of the skin separates the body from its environment similarly, the cell membrane, also known as 'plasma membrane,' separates the inner content from its exterior environment.
Cell Membrane
The cell membrane is known by different names like plasma membrane or cytoplasmic membrane, or biological membrane. The term "cell membrane" was first introduced by C. Nageli and C. Cramer in the year 1855. Later on, in 1931, the term "plasmalemma" for cell membrane was given by J. Plowe. The cell membrane separates the cell's internal environment from the extracellular space. This separation allows the protection of cells from their environment.
Prokaryotes vs Eukaryotes
The cell is defined as the basic structural and functional unit of life. The cell membrane bounds it. It is capable of independent existence.
1. Which of the following statements about the flow of genetic information is correct?
A. Translation occurs prior to transcription during protein synthesis.
B. During translation, the DNA template is converted to amino acids by the ribosomes.
C. During transcription, the DNA template is converted to an RNA molecule by the enzyme RNA polymerase.
D. Eukaryotic mRNA needs to be transported to the cytoplasm before the protein products are synthesized.
2. What is the main difference in the cell wall composition between eukaryotes and prokaryotes?
A. Eukaryotic cell wall is mainly composed on sugar molecules while prokaryotic cell wall has both sugars and amino acids.
B. Prokaryotic cell wall is mainly composed on sugar and lipid molecules while eukaryotic cell wall has both sugars and amino acids
C. Prokaryotic cell wall is mainly composed on sugar molecules while eukaryotic cell wall has both sugars and amino acids.
D. Eukaryotic cell wall is mainly composed on sugar and lipid molecules while prokaryotic cell wall has both sugars and amino acids.
3. Gene duplications can be beneficial except:
A. When duplicated gene serves as spare to the original gene that was rendered nonfunctional by a mutation.
B. When favorable genes are duplicated thus providing evolutionary advantage to the organism.
C. Gene duplication leads to divergence that results to formation of new competent species.
D. When gene duplications result to mutations that make the product of both copies nonfunctional.
Trending now
This is a popular solution!
Step by step
Solved in 4 steps
