You have isolated some DNA from liver cells. The base sequence of one strand of the DNA is TAGCCGA. The complementary sequence of bases on the complementary RNA must be:

ATCGGCT

AUCGGCU

CGTATTA

GCTATTA

Answer and Explanation

The Correct Answer is B

A. ATCGGCT: This is a complementary DNA strand, not RNA. DNA uses thymine (T), but RNA uses uracil (U).
B. AUCGGCU: RNA transcription pairs A→U, T→A, G→C, and C→G.
DNA: T A G C C G A
RNA: A U C G G C U
C. CGTATTA: Random mismatch, not related to either DNA or RNA pairing for this sequence.
D. GCTATTA: Also incorrect DNA base pairing and not applicable to RNA transcription.

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Correct Answer is D

Explanation

A. monosaccharides: Monosaccharides are the building blocks of carbohydrates, not lipids.
B. a glycerol plus three glycogen chains: Glycogen is a polysaccharide, not a component of triglycerides.
C. a glycerol plus three amino acid chains: Amino acids form proteins, not triglycerides.
D. a glycerol plus three fatty acid chains: A triglyceride is made of one glycerol molecule and three fatty acids-this is the primary structure of fats.

A. osmosis B. facilitated diffusion C. active transport D. through channels

Correct Answer is C

Explanation

A. osmosis: Osmosis is passive (requires no energy), so it will still occur even if mitochondria are poisoned.
B. facilitated diffusion: Facilitated diffusion uses transport proteins but does not require ATP-still functional without mitochondria.
C. active transport: Active transport requires ATP, which is produced by the mitochondria. Blocking mitochondria interrupts ATP production, halting active transport.
D. through channels: Movement through ion channels is usually passive (e.g., diffusion), and does not require ATP.

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You have isolated some DNA from liver cells. The base sequence of one strand of the DNA is TAGCCGA. The complementary sequence of bases on the complementary RNA must be:

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Naxlex Comprehensive Predictor Exams

Triglycerides are composed of:

Correct Answer is D

Explanation

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Correct Answer is C

Explanation

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