Test Bank For Molecular Biology Of The Cell 6th Edition by Bruce Alberts
ISBN-10 : 0815345240 ISBN-13 : 978-0815345244
CHAPTER 1: CELLS AND GENOMES
© Garland Science 2015
1.1. Scientists discover more than ten thousand new species of living organisms every year. What is shared between all of these organisms?
- They are made of cells, whose nuclei enclose their DNA.
- They obtain their energy from sunlight.
- They produce and use adenosine triphosphate (ATP).
- Their genome contains at least 1000 genes.
- All of the above.
2.2. All cells …
- have membrane transport proteins.
- synthesize proteins on the ribosome.
- replicate their genome by DNA polymerization.
- transcribe their genetic information by RNA polymerization.
- All of the above.
7.3. Imagine a segment of DNA (within a gene) encoding a certain amount of information in its nucleotide sequence. When this segment is fully transcribed into mRNA and then translated into protein, in general, …
- the protein sequence would carry more information compared to the DNA and mRNA sequences, because its alphabet has 20 letters.
- the protein sequence would carry less information compared to the DNA and mRNA sequences, because several codons can correspond to one amino acid.
- the amount of information in the mRNA sequence is lower, because the mRNA has been transcribed using only one of the DNA strands as the template.
- the amount of information in the mRNA sequence is higher, because several mRNA molecules can be transcribed from one DNA molecule.
8.4. Which of the following processes that happens inside a cell DOES NOT normally require consumption of free energy by the cell?
- Replication of the genetic material
- Import of nutrients from the environment
- Diffusion of small molecules within the cell
- Regulation of gene expression
- Synthesis of enzymes that catalyze cellular reactions
9.5. Which of the following would you NOT expect to find in a bacterial cell?
- Swimming using flagella
- Having a cell wall around the plasma membrane
- ATP production in mitochondria
- Protein production on the ribosome
- Sexual exchange of DNA with other bacteria
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