________ are the long thin cells of skeletal muscles.

a. Myofibrils
b. Bursa
c. Sarcomeres
d. Fibers
e. Tendons.


Ans: d. Fibers

Biology & Microbiology

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Why is ubiquitin nicknamed the "doom tag"?

a. When ubiquitin binds to a target protein, the ubiquitin enzyme degrades the protein. b. When ubiquitin binds to a target protein, the complex is sent to the proteasome and degraded. c. If a cell is deficient in ubiquitin, the cell will die. d. High levels of ubiquitin in a cell cause the cell to destroy vital proteins, leading to premature cell death. e. Ubiquitin binds to ribosomes and prevents them from translating proteins necessary for cell survival.

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Which of the following organs of the endocrine system secretes melatonin?

a. pituitary gland b. pancreas c. pineal gland d. adrenal glands e. thyroid gland

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A nucleosome consists of DNA wrapped around scaffolding proteins

__________________ Indicate whether the statement is true or false.

Biology & Microbiology

Which of the following is considered a model for enzyme action?

A. Lock and Key model B. Enzyme interaction model C. Transformation model D. Transcription model

Biology & Microbiology