51 In the Watson and Crick model of DNA, the \"steps\" of the ladder are compose

Question

51 In the Watson and Crick model of DNA, the "steps" of the ladder are composed of a purine and a pyrimidine C. two purines D. two pynimidines A sugars E, a sugar and a phosphate molecule squares depict maies. Colored shapes represent affected individuals (expressing a trait) and uncolored shapes are unaffected (do not express a trait). 52. The pedigree chart depicts the inheritance pattern of Circles depict females and Patten A an autosomal recessive characteristic with both parents being heterozygous an autosomal dominant characteristic with both parents being homozygous dominant an autosomal recessive characteristic with both parents being homozygous recessive C. D none 53. Which of the following statements about DNA replication is NOT correct? A. Unwinding of the DNA molecule occurs as hydrogen bonds break. B. Replication occurs as each base is paired with another exactly like it. is C The process is known as semiconservative replication because one old strand conserved in the new molecule. D. The enzyme that catalyzes DNA replication is DNA polymerase. E. Complementary base pairs are held together with hydrogen bonds. 54. Which statement is NOT true about DNA replication? A It proceeds in a 5-to-3' direction only 8. One strand of new DNA is replicated faster than the other strand at the replication fork. C. DNA can only replicate at one point on a chromosome at one time D. It occurs more rapidly in bacteria than in eukaryotes. E. Replication can only begin at a special origin of replication. 55. For translation to take place, which of the following would NOT be required to be present? A. DNA B. mRNA C. tRNA-amino acid complex D. rRNA E. ribosome 56.A (an) is a group of three bases on IRNA that is complementary to a specific mRNA codon. A codon B. anticodon C. poly-A tail D. cap

Explanation / Answer

ANSWER - 51 (B) A PURINE AND PYRIMIDINE

In the Watson and Crick model of DNA, the "steps" of the ladder are composed of a purine and a pyrimidine

ANSWER 52 - (A) AN AUTOSOMAL RECESSIVE CHARACTERSTIC WITH BOTH PARENT BEING HETEROZYGOUS

ANSWER 53 - (B) REPLICATION OCCURS AS EACH BASE IS PAIRED WITH EXACTLY LIKE IT.

The rules of base pairing (or nucleotide pairing) are: A with T: the purine adenine (A) always pairs with the pyrimidine thymine (T) C with G: the pyrimidine cytosine (C) always pairs with the purine guanine (G). WHICH ARE DIFFERENT IN NATURE .

ANSWER 54 - (C) DNA CAN REPLICATE AT ONE POINT ON A CHROMOSOME AT ONE TIME

The Dna can replicate at many sites at same time in a chromosome  

ANSWER 55 - (A) DNA

THERE IS NO NEED OF DNA AS MRNA IS ALREADY FORMED WHICH WILL BE USED IN THR REST OF THE PROCEDURE

ANSWER 56 - (B) ANTICODON

The anticodon region of a transfer RNA is a sequence of three bases that are complementary to a codon in the messenger RNA.

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