Answer:
Active transport is the movement of molecules across the cell membrane by using cellular energy. Passive transport is the movement of molecules across the membrane without the use of active transport. No energy is required in this process.
Answer:
b
Explanation:
water's hydrogen bonds allow it to move upwards against gravity through plant veins.
The correct answer is: (a) RNA polymerase (along with its sigma subunit) can initiate transcription on its own.
More differences between prokaryotic and eukaryotic transcription:
• In prokaryotes transcription occurs in the cytoplasm (unlike in eukaryotes in nucleus) and it is simultaneous with translation,
• In prokaryotes there is only one type of RNA polymerase (in eukaryotes there are three types of them).
• There is no sigma subunit in eukaryotes, the initiation of transcription begins thanks to initiation factors.
• Promoter region in prokaryotes contains pribnow box, while in eukaryotes it contains TATA and CAT box.
