PCB 3703C Lecture Notes - Lecture 2: Nuclear Membrane, Nucleolus, Cell Cycle

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31 Aug 2017

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Cell physiology part 2: the nucleus activities by providing instructions for protein synthesis, the control center of the cell and contains genetic materials (dna) directs cell"s. Nuclear envelope covers externally and then continues with lumen of: main parts of the nucleus: rough endoplastic reticulum. Chromatin is thread like material in nucleus composed of dna and histone proteins. Dna is double helix chain of nucleotides: nucleotides consist of sugar, phosphate, and one of four bases: thymine (t), adenine (a), cytosine (c) and guanine (g) Chromosomes contains a single very long molecule of dna: 46 chromosomes in typical human. Nucleoli the center and is a ribosome producing machine: the cell life cycle. (1) interphase preparation for cell division and has 3 steps. G1 (gap 1): cells are active and grow tremendously and centrioles start to replicate. G2 (gap 2): secretion and production of some enzymes occurs needed for cell division.

Related Questions

1. Unlike DNA, RNA contains

deoxyribose

a double strand

phosphates

uracil

Nucleic acid structure

2. In transcription, uracil will bond with:

thymine

cytosine

adenine

guanine

Transcription

3. The first team of scientist to document the structure of DNA was:

Franklin and Wilkins

Watson and Crick

Pauling and Chargoff

None of the above

DNA structure

4. Organelles that synthesize protein are:

lysosomes

ribosomes

endoplasmic reticulum

golgi bodies

5. Most of the time in a cell's life, it's DNA is in the form of:

Chromatin

Chromatids

Replicated chromosomes

Spindle fibers

6. Uracil is a nitrogen base that pairs with adenine. Using this information, one could conclude that uracil is a:

Purine

Pyrimidine

Neither a purine or pyrimidine

Not enough information

7. a nucleotide does not consist of a:

polymerase

5-carbon sugar

phosphate group

nitrogen base

8. The genetic code in DNA of an individual depends on the sequence (order) of:

nucleotides

purines only

phosphates

sugars

9. Before a cell divides, it must duplicate its DNA in a process known as:

translation

transformation

transcription

replication

10. The basic unit (building block) of a protein is a (an):

carbohydrate

amino acid

lipid

hydrogen bond

11. Unlike DNA, RNA contains:

deoxyribose

a double strand

phosphates

uracil

12. The structure of DNA was first documented in:

1945

1953

1956

1962

13. In DNA replication, the new molecules produced are:

of unequal length

both assembled in the same direction

built with purines as the backbone

assembled in opposite directions

DNA replication

14. The "backbone" of DNA is composed of:

ribose and phosphates

deoxyribose and phosphates

ribose and uracil

deoxyribose and thymine

DNA structure

15. RNA differs from DNA in which of the following ways?

RNA is single-stranded

RNA contains ribose

RNA does not contain thymine

All of the above

DNA structure

16. Which of the following is NOT required for the transcription process itself?

RNA polymerase

DNA

uracil-containing nucleotides

ribosomes

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PCB 3703C Lecture Notes - Lecture 2: Nuclear Membrane, Nucleolus, Cell Cycle

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