The organelles called mitochondria originate from
A. a eukaryotic cell absorbed into a larger cell
B. part of the nucleus that broke off during mitosis
C. the endomembrane system (membrane form the ER
D. a chloroplast that lost its ability to photosynthesize
E. a prokaryotic cell in symbiosis with a larger cell.
F. None of these answers are correct
Ans: F. None of these answers are correct
You might also like to view...
Integration of Mu DNA into the host genome is essential for
A) lytic growth. B) lysogenic growth. C) both lytic and lysogenic growth. D) neither lytic nor lysogenic growth.
3.3 Assuming the same pressure gradient, flow through a vessel with a diameter of 100 m is _______ faster than through a tracheid of 25 m diameter
A. 4× B. 16× C. 64× D. 256×
Which of the following occurs in E. coli when lactose is absent from its environment?
A. Large amounts of ?-galactosidase, lactose permease, and galactoside transacetylase are made. B. Trace amounts of ?-galactosidase, lactose permease, and galactoside transacetylase are made. C. No ?-galactosidase, lactose permease, and galactoside transacetylase is made. D. The lac operon is induced. E. Polycistronic mRNA levels would be very high.
Suppose a DNA replication error is not corrected. After two cell divisions, how many of the four daughter cells
contain this mutation (assuming that the mistake was never corrected)?
a. noneb. one c. two d. three e. four