Which of the following cis-acting elements of focused promoters serves as the binding site for TFIID? 1. TATA Box
2. Enhancer
3. BRE
4. INR

1. TATA Box

Explanation:

TFIID, also called transcription factor II D, is a Transcription Factor that interacts with the minor groove of the TATA box. The TATA element is a core promoter component present in genes of eukaryotic organisms, which is formed by the consensus sequence TATA(A/T)A(A/T).  

TFIID is involved in the first stage of the transcription process, during the formation of the pre-initiation complex. TFIID contains a TATA-binding subunit and a complex of associated factors (TBP-associated factors) that interact with specific RNA polymerases, for example, by interacting with the RNA polymerase II (RNAP II) during transcription of the messenger RNA (mRNA).

the sphincter muscles at the end of the digestive tract is the anus.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.