How is complementary base pairing different when pairing DNA to DNA than when pairing DNA to mRNA?
What will be an ideal response?
Answer: mRNA never contains thymine. its always replaced with uracil. So in DNA where adenine pairs with thymine, it pairs with uracil in RNA
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Which connective tissue has a fluid matrix?
A. Adipose B. Dense connective tissue C. Cartilage D. Blood E. Loose connective tissue
If a sieve tube in a plant becomes blocked, the
plant will experience difficulty in a. carrying on transpiration. b. transporting minerals. c. translocating food throughout the plant. d. completing cell division and experiencing normal growth. e. healing wounds.
Why is it essential that meiosis produce haploid cells?
A. so that the number of chromosomes will double each generation B. to produce haploid offspring C. to prevent the number of chromosomes from doubling each generation D. to produce diploid gametes E. to allow asexual reproduction
The bacterial A-B toxins often consist of a two-chain molecule. The 'A chain' attaches the bacterium to the cells, and the 'B chain' has biological activity against some vital function of the cells
a. true b. false