Which of the following does a bacterium NOT contain?
a. RNA
b. cytoplasm
c. ribosomes
d. mitochondria
Answer: d. mitochondria
You might also like to view...
Why is color-blindness more common in males than in females?
a. Because females would have to receive one copy of the recessive color blindness gene to actually express the trait. b. Because a male only needs to receive the recessive gene from his mother to be color-blind. c. Because color-blindness is an Y-linked trait. d. Females are hemizygous e. Males are never hemizygous
Which of these results would you predict to occur if climate change results in increased warming global temperatures?
A) Species competition will result in slower evolution in the tropics. B) The tree line (at which it is too cold for trees to grow) moves toward the north and south poles. C) Winters will be longer toward the poles. D) Land animals will suffer fewer consequences than marine animals.
Of the following structures, which one is not made of specialized leaf cells?
A. Sclereids B. Guard cells C. Trichomes D. Tendrils E. Spines
When acetyl-CoA containing radioactively labeled carbon atoms is fed to cells, the CO2 produced is not initially radioactive. However, molecules of citrate and oxaloacetate are radioactive. Only after some time has passed will radioactive CO2 be released. What is the best explanation for this observation?
A. Acetyl groups are not metabolized directly into CO2, but enter a cyclical metabolic pathway. B. Acetyl groups are not metabolized directly into CO2, but enter a linear metabolic pathway. C. Acetyl groups first combine with citrate and oxaloacetate before being metabolized into CO2. D. Acetyl groups are metabolized directly into CO2.