In metabolic reactions, enzymes:


Ans: Increase rate of reaction by decreasing activation energy

Biology & Microbiology

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The ten phyla of living land plants include:

A. (1) liverworts, (2) hornworts, (3) mosses, (4) lycophytes, (5) pteridophytes, (6) cycads, (7) ginkgos, (8) conifers, (9) gnetophytes, and (10) angiosperms B. (1) liverworts, (2) hornworts, (3) mosses, (4) lycophytes, (5) pteridophytes, (6) cycads, (7) ginkgos, (8) conifers, (9) gnetophytes, and (10) flowering plants C. (1) Hepatophyta, (2) Anthocerophyta, (3) Bryophyta, (4) Lycopodiophyta, (5) Pteridophyta, (6) Cycadophyta, (7) Ginkgophyta, (8) Coniferophyta, (9) Gnetophyta, and (10) Anthophtya D. (1) liverworts, (2) hornworts, (3) mosses, (4) lycophytes, (5) ferns, horsetails, and whisk-ferns, (6) cycads, (7) ginkgos, (8) conifers, (9) gnetophytes, and (10) flowering plants E. all the other choices provided are correct.

Biology & Microbiology

Of the 64 triplet combinations in the genetic code, ____________________ code(s) for amino acids and ____________________ code(s) for the signal that ends protein synthesis

Fill in the blank(s) with correct word

Biology & Microbiology

How does the antiparallel polarity of DNA strands contribute most to the integrity of genetic information?

A) A DNA double helix cannot be broken or degraded. B) The antiparallel polarity of the strands means that replication occurs more quickly, decreasing the likelihood of DNA damage. C) Hydrogen bonding between strands is very stable, so DNA bases cannot be not damaged by environmental agents. D) Both antiparallel strands can be replicated continuously, which is more accurate than discontinuous replication. E) Each antiparallel strand can serve as a template to produce the other strand in the event of DNA damage.

Biology & Microbiology

Calcitonin acts in opposition to

a. parathyroid hormone. b. thyroxine. c. glucagon. d. the adrenal medulla. e. osteoblast activity.

Biology & Microbiology