PCB 3063 Lecture Notes - Lecture 2: Fetus, S Phase, Cell Growth
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What step in DNA replication precedes the pairing of complementary bases?
A. | polymerization of DNA. | |
B. | formation of the histone core. | |
C. | mitotic division. | |
D. | separation of the two strands. | |
E. | joining of the two strands. |
In eukaryotes, transcription occurs in the
A. | ribosome. | |
B. | mitochondria. | |
C. | cell membrane. | |
D. | cytoplasm. | |
E. | nucleus. |
Normal human body cells contain how many chromosomes?
A. | 46 | |
B. | 22 | |
C. | 23 | |
D. | 44 | |
E. | 42 |
Hershey and Chase performed an experiment in which they used radioactive isotopes to phosphorus and sulfur to label different components of bacterial viruses. Their results clearly showed that
A. | the viruses did not contain protein. | |
B. | genetic material normally contains radioactive isotopes. | |
C. | the viruses did not contain DNA. | |
D. | protein was entering into the infected bacteria. | |
E. | DNA was entering into the infected bacteria. |
A package of histones with DNA wrapped around them forms spherical structures called
A. | nucleosomes. | |
B. | lysosomes. | |
C. | ribosomes. | |
D. | nucleoli. | |
E. | chromatin. |
DNA replication
A. | does not require proteins. | |
B. | is constantly happening in a cell. | |
C. | occurs in G1 of interphase. | |
D. | takes place in the nucleus of the cell. | |
E. | occurs in the cytoplasm of the cell. |
The two subunits of the ribosome join during
A. | promotion of transcription. | |
B. | initiation of translation. | |
C. | termination of transcription. | |
D. | termination of translation. | |
E. | elongation. |
DNA replication of a single DNA molecule is referred to as semiconservative because
A. | each of the two DNA molecules will consist of one parental strand and one newly synthesized strand. | |
B. | all the DNA strands in the two DNA molecules will have both parental and newly synthesized DNA. | |
C. | it results in two nonidentical DNA molecules. | |
D. | of the two DNA molecules, one is made up totally of parental DNA, while the other is entirely newly synthesized DNA. | |
E. | one DNA strand is replicated continuously, while the other must be replicated discontinuously. |
The bases are bonded to what part of the backbone of the DNA molecule?
A. | the 4â carbon atom of the sugar molecule. | |
B. | the 3â carbon atom of the sugar molecule. | |
C. | the 5â carbon atom of the sugar molecule. | |
D. | the 1â carbon atom of the sugar molecule. | |
E. | the 2â carbon atom of the sugar molecule. |
i need help with this homwork please choose the correct answers and just be claer to read and understand for the slect the apply qusestions too and it is important i realy need the right answers so please be claer not write randomly i really need the correct answers to study for my test so hop you can help me
Question 1
What is the smallest cell you could find?
Mycoplasma |
Archaea |
Bacteria |
Cyanobacteria |
Question 2
TEMs appear as 3D images
True |
False |
Question 3
Bacteria are what cell type? Write one word as the answer in lowercase and using no syntax.
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Question 42 pts
ALL eukaryotic cells have which of the following. Click all that apply.
nucleoid |
cell membrane |
chloroplasts |
nucleus |
membrane enclosed cell organelles |
mitochondria |
Question 5
Prokaryotes and eukaryotes both have which if the following cellular components. Click all that apply.
ribosomes |
plasma membrane |
DNA |
nucleoid |
Question 6
I am made of one 60s and one 40s subunit, which organelle am I?
protein |
lipid |
bacterial ribosome Question 9 The difference between the rough and smooth ER is
Question 10 The site where many lipids, including cell membrane is produced.
Question 11 Name the organelle: In muscle cells in particular, I would increase in number and size in response to frequent exercise
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Question 12 In animal cells, glucose would be mobilized from its storage molecule (glycogen) in this part of the cell.
Question 13 Which of these is associated with the rough ER
Question 14 Which organelle sorts, modifies and stores substances produced on the rough ER. Write two words as the answer in lower case separated by a space. Question 15 Which organelle is responsible for ATP production. Write one word in the singular as the answer. Question 16 You inherit all of your mitochondria from your
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Question 27
What accounts for 40% of the protein in our bodies?
Fibers |
Cells |
Collagen |
Keratin |
Question 28
Animal cells have cell walls
True |
false |