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Name the blood vessels than is associated with the transport of hormones from the hypothalamus to the anterior pituitary

Posted by Esha Radwal 6 years, 10 months ago

CBSE > Class 11 > Biology

1 answers

Gaurav Seth 6 years, 10 months ago

Hypophysial portal vein is associated with the transport of hormones from the hypothalamus to the anterior pituitary

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Enzymes in biomolecule.?please explain.?

Posted by Shriya Sharma 6 years, 10 months ago

CBSE > Class 11 > Biology

2 answers

Kartik ? 6 years, 10 months ago

There are also organic or inorganic compounds known as co factors ...without which many enzymes won't work. In these cases the protein part of the enzyme is called the apoenzyme. There are also certain inhibitors which are required to stop the function of enzymes when not needed. When these inhibitors closely resemble the substrate. These are called competitive inhibitors. As they compete with the substrate to bind with the enzyme.

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Kartik ? 6 years, 10 months ago

Most of the Enzymes are proteins. Their function is to catalyse a reaction. A reaction which would take a lot of time and energy to happen ...using an enzyme can take place in seconds. For eg. CO2 's reaction with water under normal conditions is very slow.. about 200 molecules of H2co3 an hour. But using Carbonic anhydrase ( an enzyme) you can form 600,000 molecules per second. Enzymes do this due to their structure. In their structure there are crevices ...known as active sites. The reactant or substrate fits in this active site perfectly. After this the bonds of the substrate are loosened so that it can form the product more easily and with less energy requirements.

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What is heart?

Posted by Sparsh Jain 6 years, 10 months ago

CBSE > Class 11 > Biology

1 answers

Esha Radwal 6 years, 10 months ago

Heart,the mesodermally derived organ,is situated in the thoracic cavity,in b/w the two lungs,slightly tilted to the left. It has the size of a clenched fist. It is protected by a double walled membranous bag,pericardium, enclosing the pericardial fluid. Our heart has four chambers,two atria and two ventricles.....

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Difference between cilia and flagella.

Posted by Adarsh Kumar 6 years, 10 months ago

CBSE > Class 11 > Biology

1 answers

Yogita Ingle 6 years, 10 months ago

Cilia	Flagella
The number of cilia is comparatively more (typically ranges in the thousands)	The number of flagella is comparatively less (usually ranges from 1 to 8)
Cilia is usually shorter in length	Flagella is comparatively longer in length
Beating pattern of Cilia is very complicated – Can move in wide range of motions	Beating pattern of Flagella involves circular, wave like or propeller-like motion
Found in Eukaryotic cells	Found in prokaryotic cells and eukaryotic cells
Cilia are of two types: Non motile cilia and Motile cilia	Flagella are of three type: Bacterial flagella, Archaeal flagella and Eukaryotic flagella

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In apoplast pathway water moves away from cytoplasm and passes through the intercellular spaces but in the diagram given in ncert it does not actually seen..??

Posted by Badar Alam 6 years, 10 months ago

CBSE > Class 11 > Biology

2 answers

Avantika Tayal 6 years, 10 months ago

Srry in third line its not moves moves its water moves.

1Thank You

Avantika Tayal 6 years, 10 months ago

Your explanation is corrwct. Actuallt there are 2 types of movement .in apoplast movement moves moves from the root hair to xylem through cell wall.it does not move away from cytoplasm. In symplast the movement is through cytoplasm and intecellular plasmodesmata to xylem.

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Why in conduction and transmission of nerve impulse in neurons the resting potential is -70mV and what does it means????? Plz ans me...

Posted by Sagar Pandya 6 years, 10 months ago

CBSE > Class 11 > Biology

0 answers

ANSWER

The onion root tip cells have 16 chromosomes in each cell. How many chromosomes will the cell have at G1 phase, after S phase, and after M phase? Also, what will be the DNA content of the cells at G1, after S and at G2, if the content after M phase is 2C?

Posted by Chayaa K 6 years, 10 months ago

CBSE > Class 11 > Biology

0 answers

ANSWER

Which pigment is responsible for red color of carrot

Posted by Sagar Pandya 6 years, 10 months ago

CBSE > Class 11 > Biology

1 answers

Ankit Sangwan 6 years, 10 months ago

Lycopene another form of carotene

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Trick to remember the formula of some important flower families

Posted by Kriti Sharma 6 years, 10 months ago

CBSE > Class 11 > Biology

1 answers

Ayursh Sharma 6 years, 10 months ago

No trick you have to memorise it

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What are important features of Watson and Crick modal?

Posted by Sunil Nayak 6 years, 10 months ago

CBSE > Class 11 > Biology

1 answers

Sagar Pandya 6 years, 10 months ago

Imp features of watson crick model or double helix model of DNA are as follows: 1.The DNA molecule consists of 2 polynucleotide chain or strands that spirally twisted around each other & coiled to form a right handed double helix

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