AP BIOLOGY

THE CELL

STRUCTURE AND FUNCTION OF THE CELL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A scientist is comparing ribosomes in a prokaryotic cell and a eukaryotic cell. Which of the following is a property of ribosomes in the eukaryotic cell only and not the prokaryotic cell?
A
Proteins are assembled on ribosomes.
B
Some of the ribosomes are attached to the cell membrane.
C
Some of the ribosomes are located in the endoplasmic reticulum.
D
All of the ribosomes are distributed evenly throughout the cytoplasm.
Explanation: 

Detailed explanation-1: -Which of the following is a property of the ribosomes in the eukaryotic cell only and not the prokaryotic cell? Some of the ribosomes are located in the endoplasmic reticulum.

Detailed explanation-2: -Ribosomes are a specific target of some antibiotics since there is a significant difference in size and structure between eukaryotic and prokaryotic ribosomes: eukaryotic ribosomes consist of a 60S subunit and a 40S subunit, whereas prokaryotic ribosomes are composed of 30S and 40S subunits.

Detailed explanation-3: -In prokaryotes, the ribosomes are of 70S type and smaller compared to the 80S type found in the eukaryotes.

Detailed explanation-4: -What is the difference between Prokaryotic and Eukaryotic cells? The defining characteristic feature that distinguishes between prokaryotic and eukaryotic cell is the nucleus. In prokaryotic cells, the true nucleus is absent, moreover, membrane-bound organelles are present only in eukaryotic cells.

There is 1 question to complete.