1. Uracil pairs with
A. adenine.
B. thymine.
C. any nitrogen base.
D. uracil.
2. Alexei Romanov suffered from hemophilia, a condition that
A. causes the body to produce too many blood cells due to the body’s inability to form fibrin proteins.
B. prevents the body from absorbing vitamin B12 due to the body’s inability to form fibrin proteins.
C. causes the body to produce abnormally shaped red blood cells due to the body’s inability to form fibrin proteins.
D. prevents blood from clotting normally due to the body’s inability to form fibrin proteins.
3. 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?
A. TCC
B. UCA
C. AGU
D. TCA
4. Select the statement that is true
A. Thymine is only present in DNA, while cytosine is only present in RNA.
B. DNA has the sugar deoxyribose, while RNA has the sugar ribose
C. Translation copies DNA to mRNA, while transcription converts mRNA into proteins.
D. DNA and RNA are both double-stranded.
5. What role does tRNA play in the translation process?
A. tRNA bonds the amino acids together to then form proteins.
B. tRNA holds the "stop" codon to alert ribosomes to end protein production.
C. tRNA converts DNA into mRNA.
D. tRNA carries amino acids to the ribosome and helps form proteins.
1. A. adenine.
2. D. prevents blood from clotting normally due to the body’s inability to form fibrin proteins.
3. D. TCA.
4. B. DNA has the sugar deoxyribose, while RNA has the sugar ribose.
5. D. tRNA carries amino acids to the ribosome and helps form proteins.
1. Uracil pairs with D. uracil.
2. Alexei Romanov suffered from hemophilia, a condition that D. prevents blood from clotting normally due to the body's inability to form fibrin proteins.
3. The amino acid serine is coded by the mRNA codon AGU. The base sequence of the DNA gene that originally produced this mRNA codon is D. TCA.
4. Select the statement that is true: B. DNA has the sugar deoxyribose, while RNA has the sugar ribose.
5. The role of tRNA in the translation process is D. tRNA carries amino acids to the ribosome and helps form proteins.
1. The answer to the question "Uracil pairs with" is A. adenine. Uracil only pairs with adenine in RNA, whereas in DNA, thymine pairs with adenine.
2. The answer to the question "Alexei Romanov suffered from hemophilia, a condition that" is D. prevents blood from clotting normally due to the body's inability to form fibrin proteins. Hemophilia is a genetic disorder characterized by the body's inability to produce a protein called fibrin, which is essential for blood clotting.
3. The answer to the question "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?" is B. UCA. To determine the original DNA sequence, we need to use the complementary base pairing rules. AGU in mRNA corresponds to UCA in DNA. Remember that in RNA, uracil replaces thymine.
4. The answer to the question "Select the statement that is true" is B. DNA has the sugar deoxyribose, while RNA has the sugar ribose. DNA and RNA differ in their sugar component. DNA contains the sugar deoxyribose, while RNA contains the sugar ribose. The other statements mentioned in the options are not correct.
5. The answer to the question "What role does tRNA play in the translation process?" is D. tRNA carries amino acids to the ribosome and helps form proteins. tRNA, or transfer RNA, plays a crucial role in translation. It carries specific amino acids to the ribosome based on the codons present on the mRNA. This process allows tRNA to help form proteins by transferring the correct amino acids to the growing protein chain at the ribosome.