When placing the receptor in the mandibular premolar region, the receptor must be placed the tongue. When inserting the receptor holder into the mouth, the receptor is tipped the tongue.

Under: away from

Explanation:

Radaiation paralleling technique gives an accurate and precise representation of the image of a tooth.

When placing the receptor in the mandibular premolar region, the receptor must be placed under the tongue. When inserting the receptor holder into the mouth, the receptor is tipped away from the tongue.

c) is the correct option

Explanation:

Inhibition of Cdk activity occurs by Cdk inhibitory protein (CIPs)

A group of specific proteins called CIPs binds with active cyclin Cdk complex and cause their inactivationActivated protein retinoblastoma (p53)act as transcriptional factor and induce synthesis of Cdk inhibitory proteins p21CIPsp21CIPs is a Cdk inhibitory protein that binds and inhibit the activity of G1 Cdk cyclin complex as a result cell cycle arrest in G1 phase