Please help me I’m so confused. Page 2 did not work properly in mammals, which o

Question

Please help me I’m so confused. Page 2 did not work properly in mammals, which of the following would you expect to happen? The male animals would have too much X chromosome gene expression The temale animals would have too little X chromosome gene expression The female animals would have too much X chromosome gene expression. c) 8. An operon is bind to the operon, and therefore transcription proceeds. What type of genetic controlis Mustrated in this operon? a) Negative b) Positive c) Eukaryotic 9 An operon is controlled to the operon, allowing transchiption to proceed What type of genetic control is illustrated in this example? by an activator. When the actvator binds to a small molecule, the activator can bind a) Negative b) Positive c) Eukaryotic d) Translational 10 Which of the following is NOT a common cause of mutations in DNA? a) Bleach b) Sunlight c) DNA Polymerase Il d) DNA ligase 11. What is the consequence of methylation of DNA sequences called CpG islands? a) Binding of RNA polymerase b) Repression of transcription c) Recruitment of enhancer sequences d) Unwinding of DNA from histones 12 You have been analyzing a mutant strain of the bacteria, E colil After allowing several rounds of DNA replication, you observe that the new DNA strands have fragments of RNA mixed in with the DNA. Which enzyme might be mutated in this strain? a) ONA helicase b) RNA primase c) DNA polymerase Ill d) DNA polymerase I e) DNA ligase

Explanation / Answer

1) If X-chromosome inactivation did not work properly in mammals,

The correct answer is option (D) The female animals would have too much X- chromosome gene expression

2) The correct answer is option (A) Negative (It is an inducible lac operon. In this lactose function as an inducer and prevents the repressor from interacting with the operator gene. The RNA polymerase can now transcribe the structural genes).

3) The correct answer is option (A) Negative (It is repressible trp operon. )

4) The correct answer is option (B) Sunlight

5) The correct answer is option (B) Repression of transcription

6) The correct answer is an option (D) DNA polymerase I (When the replication is completed, the RNA primers are removed from the 5' ends of Okazaki fragments by the RNase activity of DNA polymerase I.

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