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Read following statements (1-4). 1. In...

Read following statements (1-4).
1. In transcriptoin, adenine pairs with uracil.
2. Regulation of lac operon by repressor is referred to as positive regulation.
3. The human genome has approximately 50,000 genes.
4. Haemophilia is a sex - linked recessive disease.
How many of the above statements are right ?

A

Two

B

Three

C

Four

D

One

Text Solution

Verified by Experts

The correct Answer is:
A
Symbiotic nitrogen-fixing bacteria and cyanobacteria are found in association to plant. The most common symbiotic bacteria are Rhizobium
In dicot stem, the cambium present between xylem and phloem in vascular bundles is called fascicular or intrafascicular cambium. Besides this, some cells of medullary ray also become meristematic and called interfascicular cambium. Refer in Book
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