Menstrual flow results in the discharge of

a. the follicle.
b. the corpus luteum.
c. the endometrial lining.
d. surface cells from the vagina.
e. blood from the blood vessels on the outer
surface of the uterus


C

Biology & Microbiology

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Scientists have found that polypeptides that are normally synthesized in the endoplasmic reticulum are about 20 amino acids longer when they are synthesized by ribosomes not attached to the endoplasmic reticulum

What is a possible explanation for the greater length of these polypeptides? A) Ribosomes attached to the endoplasmic reticulum require fewer amino acids to function. B) The 20 amino acids serve as a signal (peptide) sequence that directs the forming polypeptides to the endoplasmic reticulum, where they are cleaved off during processing. C) The 20-amino-acid sequence helps the endoplasmic reticulum package these proteins for shipping to the Golgi. D) The protein has a different function in the cytosol than in the endoplasmic reticulum.

Biology & Microbiology

In lakes and ponds, the ________ zone is a shallow-water zone along the perimeter in which light reaches the bottom

Fill in the blank(s) with correct word

Biology & Microbiology

The mitosome of Giardia has no DNA within it. If it did contain DNA, then what predictions should we be able to make about its DNA?

1. It is linear. 2. It is circular. 3. It has many introns. 4. It has few introns. 5. It is not associated with histone proteins. 6. It is complexed with histone proteins. A) 1, 3, and 5 B) 1, 4, and 5 C) 2, 3, and 6 D) 2, 4, and 5

Biology & Microbiology

Many identical copies of genes cloned in bacteria are produced as a result of _____

A) plasmid replication B) bacterial cell replication C) transformation D) plasmid and bacterial cell replication

Biology & Microbiology