In feedback inhibition of a metabolic pathway, where does the inhibitor bind?
- to a substrate or the product of the last reaction
- to the enzyme of the first reaction
- to the enzyme of the last reaction
- to the substrate of the first reaction
- to the product of the first reaction
to the enzyme of the first reaction
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How can two cells of a complex multicellular organism have the same genome, but markedly different structures and functions?
A. During differentiation, as cells become specialized, they lose portions of their genome that are no longer needed. B. Different genes are expressed in different cells. C. Part of the process of differentiation of cells involves mutations in the genome. D. Once differentiation begins, the genome no longer controls cellular functions.
In contrast to eyes, the eyespots of most invertebrates
cannot a. detect light. b. distinguish darkness from daylight. c. form distinct images. d. discern shadows. e. possess photoreceptors.
What structures provide support to the leaf and prevent it from collapsing under its own weight?
a. palisade mesophyll and spongy mesophyll b. guard cells and the lower epidermis c. bundle sheaths and bundle sheath extensions d. cuticle and the upper epidermis e. trichomes and stipule
The disease caused by B19 virus, a (papillomavirus/parvovirus/polyomavirus), is known as erythema infectiosum and produces a distinctive rash
What will be an ideal response?