What do transfer RNA molecules do during protein synthesis?
copy the coded message from the DNA and carry it into the nucleus
copy the coded message from the protein and carry it into the nucleus
carry amino acids and add them to the growing protein
copy the coded message from the DNA and carry it into the cytoplasm
The _____ along a gene specifies the type of protein that will be produced.
number of DNA bases
order of RNA bases
number of RNA bases
order of DNA bases
What happens during meiosis?
Each sex cell copies itself to form four new chromosomes.
Two sex cells combine to form a single new cell.
Chromosome pairs separate and are distributed into new sex cells.
Chromosome pairs remain together when new sex cells are formed.
A mutation that results in antibiotic resistance is a _____.
neutral mutation
environmental mutation
helpful mutation
harmful mutation
Which describes meiosis I?
The chromosomes move to the center of the cell.
Centromeres hold the two chromatids together.
The chromosome pairs line up in the center of the cell.
A copy of each chromosome in the cell is copied.
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