Which statement about bacteria is FALSE?
a. Some bacteria can photosynthesize.
b. Bacteria are important decomposers.
c. A small percentage of bacteria are pathogenic.
d. Bacteria are not cellular and are sometimes not classified as life forms.
e. Bacteria convert atmospheric nitrogen into ammonia and then nitrates that can be used by plants.
d
You might also like to view...
How were experiments done by Griffith similar to those done by Avery, MacLeod, and McCarty?
A. Both used a mouse host. B. Both used pneumococcal bacteria. C. Both used purified DNA. D. Both were done in the 1940s. E. Both used enzymes that destroyed DNA.
The thin filament contains _____ molecules.
A. actin B. myosin C. troponin D. tropomyosin E. All of the choices are correct except myosin
Which of the following statements about the sodium-potassium pump is false?
a. Most cells of the body have sodium-potassium pumps b. The sodium-potassium pump moves sodium ions from inside the cell to outside, while importing potassium ions from the extracellular fluid. c. The sodium-potassium pump is a form of gated passive transporter. d. The transporter changes shape in response to binding of its target molecules.
Which of the following statements is true about micro-RNAs?
A) They are too small to be of any use to the cell. B) They bring amino acids to the ribosome. C) They regulate the amount of protein in a cell by interfering with mRNAs. D) Alternative splicing converts them into mRNAs.