Which one of the following is characteristic of an isotonic muscle contraction but not an isometric muscle contraction?

A) generates a force
B) moves an object or part of the skeleton
C) helps an individual maintain an upright position
D) requires energy
E) helps an individual maintain posture


B

Biology & Microbiology

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Which virion release process is most often used by enveloped viruses?

A. Diffusion through channel protein B. Facilitated diffusion C. Budding D. Lysis

Biology & Microbiology

Which of the following features distinguishes all hormones from neurotransmitters?  

A.  Hormones require large concentrations to have an effect, while neurotransmitters require only low concentrations. B.  A hormone affects reproductive functions, while neurotransmitters control all other processes. C.  Hormones travel via the blood to a target tissue, while neurotransmitters cross the synaptic cleft to a postsynaptic cell. D.  Hormones are steroids, while neurotransmitters are amino acids.

Biology & Microbiology

Which of these molecules must be replenished to continue the citric acid cycle?

a. citrate b. succinyl CoA c. oxaloacetate d. acetyl CoA

Biology & Microbiology

Eukaryotic polymerases interact with which protein that acts as the sliding clamp in eukaryotic DNA replication?

What will be an ideal response?

Biology & Microbiology