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
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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.
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
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.
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