GENERAL HISTOLOGY

INTRODUCTION

CELL STRUCTURE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Mitochondria are found in most eukaryotic cells and contain their own DNA and ribosomes that are similar to those typical of many prokaryotic cells. Which of the following statements is justified by these observations?
A
The mitochondrion is the only location in which eukaryotic cells can synthesize ATP.
B
An ancestral cell most likely engulfed anaerobic prokaryote in a relationship that proved beneficial for both cells.
C
Mitochondrial membranes provide abundant surface area for reactions because of the infoldings called cristae.
D
The mitochondrion plays a role in respiration, but it also stores the cell’s extra mRNA.
Explanation: 

Detailed explanation-1: -Mitochondria are found in most eukaryotic cells and contain their own DNA and ribosomes that are similar to those typical of many prokaryotic cells. Which of the following statements is justified by these observations? A. The mitochondrion is the only location in which eukaryotic cells can synthesize ATP.

Detailed explanation-2: -Most important are the many striking similarities between prokaryotes (like bacteria) and mitochondria: Membranes-Mitochondria have their own cell membranes, just like a prokaryotic cell does. DNA-Each mitochondrion has its own circular DNA genome, like a bacteria’s genome, but much smaller.

Detailed explanation-3: -Ribosomes are non-membrane bound organelles found in both eukaryotic as well as prokaryotic cells.

Detailed explanation-4: -Like a prokaryotic cell, a eukaryotic cell has a plasma membrane, cytoplasm, and ribosomes, but a eukaryotic cell is typically larger than a prokaryotic cell, has a true nucleus (meaning its DNA is surrounded by a membrane), and has other membrane-bound organelles that allow for compartmentalization of functions.

Detailed explanation-5: -The cells of all prokaryotes and eukaryotes possess two basic features: a plasma membrane, also called a cell membrane, and cytoplasm.

There is 1 question to complete.