Uracil pairs with (1 point)
thymine.
adenine.
any nitrogen base.
uracil.
adenine.
The amino acid serine is coded by the mRNA codon AGU. What is the base sequence of the DNA gene that originally produced this mRNA codon? (1 point)
AGU
TCC
UCA
TCA
TCA
Consider the following chromosomes and if they are affected by hemophilia.
X = unaffected X chromosome, x = X chromosome affected by hemophilia, and Y = Y chromosome.
If an Xx female and XY male have children, what fraction of their offspring will have an affected chromosome, and what fraction is likely to be affected by hemophilia?
(1 point)
1/2 and 1/3
1/4 and 1/4
1/2 and 1/4
1/4 and 1/2
The answer is 1/2 and 1/4.
Select the statement that is true. (1 point)
DNA and RNA are both double-stranded.
Thymine is only present in DNA, while cytosine is only present in RNA. DNA has the sugar deoxyribose, while RNA has the sugar ribose.
Translation copies DNA to mRNA, while transcription converts mRNA into proteins.
Thymine is only present in DNA, while cytosine is only present in RNA. DNA has the sugar deoxyribose, while RNA has the sugar ribose.
What role does tRNA play in the translation process? (1 point)
tRNA bonds the amino acids together to then form proteins.
tRNA carries amino acids to the ribosome and helps form proteins.
tRNA holds the "stop" codon to alert ribosomes to end protein production.
tRNA converts DNA into mRNA.