In one ore two sentences, explain how the ER and nucleus developed in early eukaryotes.
ANSWER:
Endoplasmic reticulum and nucleus developed in early eukaryotes from the infoldings of plasma membrane.
Plasma membrane infolding around the DNA could have evolved into the nuclear envelop.
The outer double membrane of nucleus is continuous with the membrane of endoplasmic reticulum.
In one ore two sentences, explain how the ER and nucleus developed in early eukaryotes.
Bacteriology -Explain conditions on early earth that facilitated evolution of eukaryotes. -How is a sequence-based evolutionary analysis of microbes performed? --------------------------------------- -what are transgenic organisms and why is it relevant? -What is PCR Polymerase Chain Reaction and what is its importance? -Describe the process of molecular cloning using plasmids. -What is a palindrome and how is it used by restriction endonucleases?
What are the three kinds of thunderstorms? Explain each in one or two sentences. How is RADAR useful in determining whether or not a thunderstorm might produce a tornado?
Explain in 3 to 4 sentences. 9. A neutron is trapped within the nucleus of an atom. Are the neutron's energies quantized? 10. A blaster emits a beam of electrons. Is it easier to generate the electrons by ionizing hydrogen or helium atoms? Explain your answer.
How does the anatomy of the nucleus and rough ER reflect the central dogma of molecular biology?
Question 6 (3 marks): In one or two sentences, explain how completing a Life-Cycle assessment of a building is a better indicator of environmental performance than simply specifying Recycled and/or Local materials.
Explain the theory of endosymbiosis and explain how it relates to the evolution of Eukaryotes and their mitochondria and chloroplasts.
The origin of the Eukaryotes is tied very closely to organelle biology. Discuss two adaptations that may have been required as precursor to the Eukaryotic cell developing a nucleus. What is the residual evidence for these adaptations? What are some of the challenges presented for cell function by the nucleus and how are these overcome?
This question is about mechanisms of gene regulation in eukaryotes. a) In Drosophila melanogaster, Sex-lethal (Sxl) controls somatic sexual development. i. Describe the regulatory mechanism that leads to the presence of Sxl protein only in female early embryos. [4 marks] ii. Explain how this difference is maintained later in the life cycle [6 marks] b) List two RNA modifications present in eukaryotes. Describe in detail the function of one of these RNA modifications in a living cell. [6 marks] c)...
This question is about mechanisms of gene regulation in eukaryotes. a) In Drosophila melanogaster, Sex-lethal (Sxl) controls somatic sexual development. i. Describe the regulatory mechanism that leads to the presence of Sxl protein only in female early embryos. [4 marks] ii. Explain how this difference is maintained later in the life cycle [6 marks] b) List two RNA modifications present in eukaryotes. Describe in detail the function of one of these RNA modifications in a living cell. [6 marks] c)...
Explain how the RNA polymerase gene family evolved in eukaryotes. Explain why transcription and RNA modification is so much more complicated in eukaryotes than prokaryotes. (500 word minimum)