Which of the following is in the correct order for an animal virus life cycle?
a. budding-> attachment -> entry -> assembly -> replication
b. attachment -> assembly -> entry -> budding -> replication
c. entry -> assembly -> budding -> replication -> attachment
d. replication -> assembly -> entry -> budding -> attachment
e. attachment -> entry -> replication -> assembly -> budding

e. attachment -> entry -> replication -> assembly -> budding

Explanation:

The viral life cycle starts with its attachment to the host cell and is also called adsorption. Adsorption is followed by the entry of the genome or nucleocapsid of the virus into the host cell. One inside the host cell, the viral gene expression occurs. Synthesis of viral nucleic acid occurs by the process of replication.

Transcription and translation of viral mRNA form viral proteins using the host cell enzymatic machinery. The newly formed coat proteins and nucleic acid molecules are assembled to form new nucleocapsids which are then released from the host cell. Budding is one of the processes that release the virions from the host cell.

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."