Messenger RNA, or mRNA, molecules are produced by the process of transcription from DNA molecules. During this process, complementary base pairing takes place. The bases present in the DNA molecule are:
Adenine, Thymine, Guanine and Cytosine. The complementary bases on mRNA molecules are:
Adenine (A) in DNA binds to Uracil (U) in mRNA
Thymine (T) in DNA binds to Adenine (A) in mRNA
Cytosine (C) in DNA binds to Guanine (G) in mRNA
Guanine in (G) DNA binds to Cytosine (C) in mRNA
1. B
2. B
3. C
4. C
5. D
6. C
7. C
8. D
9. C
Answer:
The cell walls of diatoms are made of silica. Their cell wall construction is known as frustule. It consists of two thin overlapping shells that fit into each other such as a soap box. When the diatoms die, the silica in their cell walls gets deposited in the form of diatomaceous earth.
Angiosperms have make sex organs called stamens
