What enzyme is responsible for replicating the ends of chromosomes in a eukaryotic cell?

a. DNA polymerase
b. RNA polymerase
c. primase
d. telomerase


d. telomerase

Biology & Microbiology

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Each amino acid made during protein biosynthesis first requires a separate biosynthetic pathway to be invoked by a cell

Indicate whether the statement is true or false.

Biology & Microbiology

Fragments corresponding to it that would be useful in deriving the sequence are

The following sequence is part of a genome. C T G T G G T A A C T G A G T C A C T A G A) GUCUC; GAUC; ACCAU; AUUGA; GACUC; CUCAG; AGUG B) CTGTG; CTAG; TGGTA; TAACT; CTGAG; GAGTC; TCAC C) CACT; CTGAG; GAGTC; TCAAT; ATGGT; GATC; GTGTC D) ACG; GTGAT; CTGTA; CTGTGTAC; GTG; CTGACTG

Biology & Microbiology

Which of the following statements about mitochondrial chemiosmosis is NOT true?

(A) A proton gradient is established across the inner membrane of the mitochondrion. (B) The potential energy released from the mitochondrial proton gradient is used to produce ATP. (C) The mitochondrial proton gradient provides energy for muscle contraction. (D) Proteins embedded in the inner mitochondrial membrane play an important role in ATP synthesis. (E) Heat energy is required to establish the electron transport chain.

Biology & Microbiology

Specialized food-conducting cells in vascular plants, known as ________, distribute sugars and other substances throughout the plant.

A. Phloem B. Stomata C. Tracheids D. Meristems E. Xylem

Biology & Microbiology