Biology Answers

How to improve the quality of the extracted DNA to obtain a better result ??

If the amount of DNA in a cell at G1 of the cell is 10 picograms (pg); what will the amount of DNA in that cell be at G2 phase of the cell cycle? Explain why?

Match each of the following molecules involved in cell communication with the function that best describes it.

1. G protein-coupled receptor
2. Receptor tyrosine kinase
3. Ligand-gated ion channel
4. Protein kinase
5. Cyclic AMP
6. Adenylyl cyclase
7. Hormone
8. Neurotransmitter

A) Protein which removes phosphates from proteins in a process called dephosphorylation

B) One of the most widely used second messengers

C) Molecule involved in long-distance signaling in plants and animals

D) Protein acts as an on/off switch: if GDP is bound to the protein, the protein is inactive.

E) Protein which converts ATP to cAMP in response to an extracellular signal

F) A messenger molecule that travels only short distances

G) This protein can trigger multiple signal transduction pathways at once

H) Protein which transfers phosphates from ATP to protein in a process called phosphorylation

I) When a signal molecule binds to this receptor, it allows specific ions (such as Na⁺ and Ca²⁺) through a channel in the receptor.

From the perspective of the cell receiving the message, what are the 3 stages of cell signaling are?

What is the first thing to do after putting a weighing boat on the balance?

Write formation reaction tripeptide leucine cis-gli.

 A monoclonal antibody, specific for a virus, was treated with an enzyme to break the bonds between the variable and constant regions.

The separated variable and constant regions were then added to cells infected with the virus.

Which statements are correct?                                  

1 The constant regions would bind to different parts of the virus antigens.

2 The viruses could be engulfed by phagocytes if they were present.

3 The variable regions would all bind to the same part of the virus antigens.

A 1 and 2 B 1 and 3 C 2 only D 3 only

Which components of an ecosystem.are for plants

What is pneumatic sac

phylogenetic relationship between hemichordates and chordates