The molecule that carries the message of the gene from the nucleus to the ribosome is
A. DNA.
B. tRNA.
C. mRNA.
D. rRNA.
C. mRNA.
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Thymidine dimers cannot be repaired in humans by which of the following?
A. nucleotide excision repair (NER) B. transcription-coupled repair (TCR) C. translesion synthesis (TLS) using Pol ? D. photoreactivation E. All of the choices given can be used to repair thymidine dimers in human cells.
The simplest sugars are called ____________________, and two of these sugars linked together form a(n) ____________________
Fill in the blank(s) with correct word
Changes that have occurred in living organisms over the past four billion years are due primarily to
A. extinction of species. B. continental drift. C. changes in geological periods. D. interaction of genetic and environmental changes. E. the change in the orbit of the moon, causing mass extinction due to volcanic activity.
Mendel called physical units responsible for the inheritance of traits "elementen." The basis for his first law is that elementen
A) separate from each other as gametes form. B) can exist as multiple alleles. C) are inherited in random combinations. D) can be cloned using nuclear transfer.