BSCI 222 Study Guide - Midterm Guide: Globin, Sickle-Cell Disease, Hemoglobin

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greymule808

4 Jan 2016

School

University of Maryland

Department

Biological Sciences Program

Course

BSCI 222

Professor

Dr.Presson

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Document Summary

A gene is a sequence of nucleotides, dna is a string of genes, so dna is a sequence of nucleotides. Dna is a double helix, which is a double string of mucleotides. A nucleotide sequence codes for a particular protein. A sequence of nucleotides is used as instructions to produce a sequence of amino acids. The basic nucleotide structure is sugar, phosphate, base, and the bases are a, t, c, g in dna. The genetic code refers to how dna provides the info for an amino acid sequence. There are four different nucleotides and 20 amino acids. Dna mutations arise when there is an error in dna copying where the enzymes that copy dna make mistakes, the wrong nucleotide is put in place, or the base pairing rule is not honored. Dna sequences can change over generations of cells. Any changes in dna sequence from one generation to the next are mutations.

Related Questions

Which of the following is NOT a direct consequence of the fact that DNA polymerase can only build onto the end of an existing nucleic acid?

Question 6 options:

	DNA replication requires primers
	Bits of DNA are lost from the ends of your chromosomes in each successive round of replication
	RNA is involved in DNA replication
	The enzyme "primase" is needed for DNA replication
	There are multiple origins of replication on each eukaryotic chromosome

How does a nucleotide sequence code for a protein in nearly all living organisms?

Question 7 options:

	a sequence of 3 nucleotides can code for one of 64 different amino acids
	a sequence of 2 nucleotides can code for one of 64 different amino acids
	a sequence of 2 nucleotides can code for one of 20 different amino acids
	a sequence of 3 nucleotides can code for one of 20 different amino acids
	a sequence of 3 nucleotides can code for 3 different amino acids

Fill in the blanks. To make one strand of DNA, _________ monomers are linked together in a chain, forming a polymer we call a(n) ________ .

Question 8 options:

	nitrogenous bases, hydrogen bond
	nucleotide, nucleic acid
	amino acid, nucleic acid
	nucleotide, nitrogenous base
	amino acid, protein

Which of the following was NOT part of the ideas that Darwin used in his book On the Origin of Species?

Question 9 options:

	organisms vary in characteristics that affect survival and reproduction
	variation in traits is often heritable
	descent with modification explains life's unity and life's diversity
	organisms inherit characteristics from their parents that the parents acquired in their own lifetimes
	natural selection is a cause of adaptive evolution

Here is a hypothetical mRNA sequence:

5' G G A U G C U A G U A U G A 3'

What is the amino acid sequence encoded by this mRNA?

Question 10 options:

	Met-Ile-Val
	Asp-Ala-Ser-Met
	Met-Leu-Val
	Ser-Met-Ile-Val
	Gly-Cys

Which of the following is a true statement about the genetic code?a. it is degenerate, meaning that more than one codon codes for one amino acidb. it explains how nucleotides along a DNA molecule can code for a sequence of amino acids in a particular proteinc. it is unambiguous, meaning that each codon codes for just one amino acid or a start or stop eventd. All of these are true statementsalso please explane why.

viridianbeetle763

1. How does DNA copy itself through the process ofreplication? What is meant by semi-conservativereplication?

2. What is the process of transcription? What is therole of mRNA and how does it relate to DNA?

3. What is the process oftranslation? What is the role of the ribosome and tRNA? How manyRNA nucleotides âcodeâ for an amino acid? How are the amino acidsconnected to make proteins?

4. How many amino acids are there? Is there more thanone codon for each amino acid?

5. Describe how a change in DNA sequence could result ina changed sequence of amino acids in a protein.

6. What is a regulatory region in DNA and how can itcontrol gene expression?

7. What is a transgenic organism?

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BSCI 222 Study Guide - Midterm Guide: Globin, Sickle-Cell Disease, Hemoglobin

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