Answer the following statements true (T) or false (F)
1. ATP synthase is a good example of a molecular machine that is composed of various protein subunits and that has moving parts.
2. The proton motive force is key to chemiosis because the H+ electrochemical gradient is lower in the intermembrane space than inside the matrix.
3. If oxygen is present, pyruvate will be converted to acetyl CoA in the mitochondrial matrix.
4. When a molecule of NAD+ (nicontinamide adenine dinucleotide) gains a hydrogen atom, the molecule becomes reduced.
5. Proteins and fats may be used as energy sources to drive aerobic respiration.
1. TRUE
2. FALSE
3. TRUE
4. TRUE
5. TRUE
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Which molecule(s) need a transport protein to cross the cell membrane?
a. water b. carbon dioxide c. glucose d. oxygen e. carbon dioxide and water
One predicted aspect of climate change is that climates, including precipitation and temperature, over most of the Earth will become more variable. Which of the following is a good crop genetic engineering strategy if this is true?
A) Only plant crops that are genetically engineered. B) Genetically engineer most crops to withstand very long droughts. C) Genetically engineer several genotypes within single crop types. D) Genetically engineer the fastest growing crops possible.
The original source of genetic variation that serves as the raw material for natural selection is ________
A) mutation B) gene flow C) geographic isolation D) random fertilization
Which of the following best describes translation?
A) DNA -> protein B) RNA -> protein C) DNA -> RNA D) RNA -> DNA E) DNA -> DNA