Question

what is the complementary strand for the dna sequence atc - gta? a. agc - att b. tta - gca c. atg - cat d. tag - cat
which nitrogenous base pairs with adenine in dna? a. guanine b. thymine c. uracil d. cytosine
how does the sequence of nitrogenous bases in dna affect an organism? a. it dictates the organisms habitat b. it determines the organisms age c. it influences the organisms characteristics d. it controls the organisms environment
which of the following statements about the double - helix structure of dna is true? a. it is made entirely of proteins b. it is a flat structure c. it consists of three strands d. it resembles a twisted ladder

Explanation:

1. In DNA, adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G). For the sequence ATC - GTA, the complementary bases are TAG - CAT.
2. In DNA, adenine (A) pairs with thymine (T).
3. The sequence of nitrogenous bases in DNA codes for proteins which influence an organism's characteristics.
4. The double - helix structure of DNA resembles a twisted ladder, with sugar - phosphate backbones as the sides and base pairs as the rungs.

Answer:

1. D. TAG - CAT
2. B. Thymine
3. C. It influences the organism's characteristics
4. D. It resembles a twisted ladder