Question

1. which of the following nucleotide base pairs are found in dna.

a. uracil thymine b. adenine thymine c. thymine guanine d. uracil adenine

1. which of the classes of rna molecules carries the genetic information as it is

needed for the construction of a protein?
a. messenger rna
b. transfer rna
c. ribosomal rna
d. complementary rna

1. which is the process by which a protein is constructed in the cytoplasm of cells?

a. translation
b. transcription
c. transposition
d. transformation.

1. the type of gene mutation in which a nucleotide replaces another nucleotide is

termed a(n)_____mutation.
a. germinal b. addition c. deletion d. substitution

1. the site of translation is the

a. nucleus. b. nucleolus. c. ribosome. d. ribozyme.

1. for translation to take place, which of the following would not be required to be

present?
a. dna b. mrna c. trna d. ribosome

1. where are ribosomes formed in the cell? in the

a. nucleolus b. translation c. cytoplasm d. transformation

1. the___of a trna molecule will base pair with the codon of a mrna molecule.

a. dna sequence b. rna polymerase c. amino acid binding site d. anticodon

Explanation:

1. In DNA, adenine pairs with thymine and cytosine pairs with guanine. Uracil is found in RNA, not DNA.
2. Messenger RNA (mRNA) carries the genetic information from DNA to the ribosome for protein synthesis. Transfer RNA (tRNA) transfers amino acids, ribosomal RNA (rRNA) is part of the ribosome structure, and complementary RNA is not the class that carries genetic information for protein construction.
3. Translation is the process of constructing a protein in the cytoplasm using mRNA, tRNA, and ribosomes. Transcription is the synthesis of RNA from DNA, transposition is a type of genetic rearrangement, and transformation is the uptake of foreign DNA.
4. A substitution mutation is when one nucleotide replaces another. A germinal mutation occurs in germ cells, an addition mutation adds a nucleotide, and a deletion mutation removes a nucleotide.
5. The ribosome is the site of translation where mRNA is decoded and proteins are synthesized. The nucleus is for DNA storage and transcription (in eukaryotes), the nucleolus is involved in rRNA synthesis, and a ribozyme is a catalytic RNA molecule.
6. DNA is not directly required for translation. mRNA provides the template, tRNA brings amino acids, and the ribosome is the site of translation.
7. Ribosomes are formed in the nucleolus. Translation is the protein - synthesis process, the cytoplasm is where many cellular processes occur but not the site of ribosome formation, and transformation is a genetic process.
8. The anticodon of a tRNA molecule base - pairs with the codon of an mRNA molecule. DNA sequence is not part of tRNA - mRNA base - pairing in translation, RNA polymerase is for RNA synthesis, and the amino acid binding site is where the amino acid attaches to tRNA, not for base - pairing with mRNA codon.

Answer:

1. B. adenine thymine
2. A. messenger RNA
3. A. translation
4. D. substitution
5. C. ribosome
6. A. DNA
7. A. nucleolus
8. D. anticodon