If a plant is bending towards the light, one would expect which enzymes to have increased in activity?

A. auxins
B. gibberellins
C. wall-loosening enzymes
D. ethylene
E. None of these is correct


C. wall-loosening enzymes

Biology & Microbiology

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(a) is an enzyme found in most cells, including liver. (b) catalyzes the production of hydrogen peroxide. (c) has as its substrate water and oxygen gas. (d) is a substance that encourages the growth of microorganisms.

Biology & Microbiology

The abundant remains of ammonites in Oklahoma indicate that Oklahoma was

A. always a semi-arid grassland. B. once a vast desert with almost no rainfall. C. once a part of a mountain range that has now eroded. D. once covered by a shallow ocean. E. part of a vast tropical forest.

Biology & Microbiology

Which of the following lists steps of mRNA production in eukaryotes in the correct order?

A) 5' cap addition, addition of poly-A tail, exon splicing, passage through nuclear membrane, transcription B) Transcription, 5' cap addition, addition of poly-A tail, exon splicing, passage through nuclear membrane C) Transcription, 5' cap addition, addition of poly-A tail, passage through nuclear membrane, exon splicing D) Transcription, addition of poly-A tail, 5' cap addition, exon splicing, passage through nuclear membrane

Biology & Microbiology

Which substance is a fossil fuel?

A) vegetable oil B) coal C) hydrogen gas D) wood

Biology & Microbiology