Hereditary material in organisms is

a. DNA
b. ATP
c. RNA
d. chromosomes


Ans: a. DNA

Biology & Microbiology

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At one end of a tRNA molecule is a sequence of 3 nucleotides called an anticodon that ____

a. signals the production of a ribosome b. signals the unwinding of the DNA coils c. initiates the movement of mRNA out of the cell nucleus and into the cytoplasm d. binds to its anti-complementary tRNA codon e. binds to its complementary mRNA codon

Biology & Microbiology

In comparison to desert habitats, urban landscapes on average have a

A) higher number of bird species. B) lower number of bird species. C) similar number of bird species. D) the same type of bird species.

Biology & Microbiology

Information from experiments is considered valid if 

A. the same results are obtained each time the experiment is performed. B. the results were predicted by the hypothesis. C. the same results are obtained by several scientists. D. All of these statements are true.

Biology & Microbiology

The predominant bacterial species that colonizes the human skin is

A. Staphylococcus epidermidis. B. Bacterioides fragilis. C. Candida albicans. D. Lactobacillus. E. Streptococcus pneumoniae.

Biology & Microbiology