Why do the centromeres of sister chromatids stay firmly connected during anaphase I?
a) The proteins of the centromere region are impervious to lipase digestion.
b) The cohesin situated at the centromeres is digested by nucleolytic enzymes.
c) The DNA of the centromeres is hydrolyzed by proteolytic enzymes.
d) They are fused together at the level of their double helices.
e) The cohesin situated at the centromeres is protected from proteolytic attack.
Ans: e) The cohesin situated at the centromeres is protected from proteolytic attack.
You might also like to view...
The medium or media of choice used to recover Legionella is:
a. buffered charcoal yeast extract (BCYE). b. Regan-Lowe agar. c. Löwenstein-Jensen medium. d. blood and chocolate agars.
Answer the following questions true (T) or false (F)
1. Because they form linings or coverings, epithelial tissues always face an open area or an exterior environment. 2. Smooth muscle may be moved by either voluntary or involuntary control depending on location in the body. 3. Subcutaneous fat tissue in humans is located mainly in the dermis.
Based on the characteristics of crenarchaeote archaeons and euryarchaeote archaeons, these organisms likely evolved in oxygen-poor habitats
A. true B. false
Which of the following is considered to be a plant behavior?
A. response to sunlight. B. response to plant hormones. C. response to touch.D. response to gravity. E. all of the choices.