Which hormone is released by the posterior pituitary gland?
a. antidiuretic hormone (ADH)
b. thyroid stimulating hormone (TSH)
c. follicle stimulating hormone (FSH)
d. melatonin
e. adrenocorticotropic hormone (ACTH)
a
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Hexaploid wheat was produced synthetically by He and co-workers. They mated the diploid species, Aegilops tauschii, and the tetraploid species, T. turgidum. Which of the following is an accurate statement about the relative contribution of each parent
to the genome of the hexaploid offspring? A) Each parent contributed equally to the genome of the offspring. B) Aegilops tauschii contributed four chromosomes by failing to complete meiosis after chromosome replication, and T. turgidum contributed two chromosomes. C) Aegilops tauschii contributed two sets of chromosomes, and T. turgidum contributed four sets of chromosomes. D) The hexaploid number appeared following mitosis with no subsequent cell division.
How can repositioning nucleosomes affect transcription (select all correct choices)?
A. Moving nucleosomes could expose a promoter resulting in repression of transcription. B. Moving nucleosomes could cover a promoter resulting in repression of transcription. C. Moving nucleosomes could expose a promoter resulting in activation of transcription. D. Transcription is not affected by repositioning of nucleosomes.
Which of the following statements about collagen is INCORRECT?
A. There can be numerous types of collagen in multicellular organisms B. It is produced from polymers of amino acids. C. It tends to promote the "sticky" characteristics of the ECM. D. Its breakdown is a contributing characteristic of wrinkling during aging. E. It is a major component of the ECM for cartilage and bone.
Which statement correctly describes archaeal cell walls?
A. Many have peptidoglycan. B. Some have an outer layer of complex polysaccharide. C. Some have an outer layer of protein. D. Some have an outer layer of complex polysaccharide and some have an outer layer of protein.