In order for a muscle contraction to occur, cross-bridges must form between structures within a muscle cell. These cross-bridges form between ______ and _____.

Fill in the blank(s) with correct word


Ans: actin; myosin.

Biology & Microbiology

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In nature, the predominant form of DNA is supercoiled in a negative direction

Indicate whether the statement is true or false.

Biology & Microbiology

PCR is the name of the reaction used to amplify specific sequences of DNA

A. true B. false

Biology & Microbiology

A fabric company wants to create a new material based on cell research for the army that is able to bear high levels of tension efficiently. What cellular structure should be the target?

A. Microtubules B. Intermediate filaments C. Microfilaments D. Centrioles E. Pili

Biology & Microbiology

The manipulation of genetic material for human purposes, the practice of ________, began almost as soon as we began to understand the language of DNA

Fill in the blank(s) with correct word

Biology & Microbiology