Key to use

Cut line and place it on clipboard

Ctrl + L 

Copy line and place it on clipboard

Alt + Q

Copy selection or line   

Plus key in number pad

Copy selected text to the clipboard

Ctrl + Insert

Paste text from the clipboard

Shift + Insert

Copy selected text to the clipboard

Ctrl + C

Cut selected text to the clipboard

Ctrl + X

Paste text from the clipboard

Ctrl + V