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Quiz on Molecular Genetics and Cells, created by 22alexpereyra on 16/12/2014.

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Molecular Genetics and Cells

Question 1 of 26

1

The result of fertilization is a zygote; what s the result of meiosis in animals?

Select one of the following:

  • clones

  • gametes

  • somatic cells

  • diploid cells

  • gametophytes

Explanation

Question 2 of 26

1

Which of the following is not associated with mitosis?

Select one of the following:

  • interphase

  • kinetochore

  • cell plate

  • tetrad

  • chromatin

Explanation

Question 3 of 26

1

In mitosis if each daughter cell has 20 chromosomes how many chromosomes would each parent cell have?

Select one of the following:

  • 5

  • 10

  • 20

  • 40

  • 80

Explanation

Question 4 of 26

1

Which of the following statements are true of metaphase?

Select one of the following:

  • The duplication of chromosomes occur

  • homologous chromosomes cross over

  • the chromosomes are aligned at the spindle equator

  • the chromosomes move to opposite poles of the cell

  • the nuclear membrane reforms

Explanation

Question 5 of 26

1

Which of the following statements are false?

Select one of the following:

  • metastasis is the spread of cancer from one location to another in the body

  • 2 types of tumors are benign and malignant

  • cancer cells divide rapidly to produce a mass of cells

  • proto oncogenes are mutated genes

  • tumor suppressor genes make p53 protein that inhibits mitosis

Explanation

Question 6 of 26

1

The chromosome number of an egg in drosophila melanogastor is 4 what is the chromosome number of a somatic cell?

Select one of the following:

  • 2

  • 4

  • 8

  • 16

  • 32

Explanation

Question 7 of 26

1

Order of cell cycle?

Select one of the following:

  • DNA Replication, Telophase, Cytokinesis, and 2 identical daughter cells

  • nothing else

Explanation

Question 8 of 26

1

Which of the following does not produce genetic variation?

Select one of the following:

  • sexual reproduction

  • crossing over

  • independent assortment

  • random fertilization

  • transcription

Explanation

Question 9 of 26

1

Circle with 4 Xs in four square, what stage of meiosis?

Select one of the following:

  • prophase 1

  • metaphase 2

  • prophase 2

  • metaphase 1

  • anaphase 2

Explanation

Question 10 of 26

1

Centromeres uncouple and chromatids are separated from each other

Select one of the following:

  • statement true of mitosis

  • statement true of meiosis 1

  • statement true of meiosis 2

  • statement true of mitosis and meiosis 1

  • statement true of mitosis and meiosis 2

Explanation

Question 11 of 26

1

Which of the following is true?

Select one of the following:

  • Spindle fibers are made up of centrioles

  • Spindle fibers bring together sister chromatids

  • Spindle fibers attach to chromosomes during anaphase

  • spindle fibers are always present in a cell

  • spindle fibers are made of microtubules

Explanation

Question 12 of 26

1

A karyotype shows all of the following characteristics of an individual except

Select one of the following:

  • gender

  • species

  • down syndrome

  • number of chromosomes

  • ploidy number

Explanation

Question 13 of 26

1

What is the arrow pointing at in this figure (x with arrow)

Select one of the following:

  • sister chromatid

  • sister chromosome

  • chromosome

  • centromere

  • homologous chromosomes

Explanation

Question 14 of 26

1

The correct flow of info from gene to phenotypic expression is

Select one of the following:

  • RNA-DNA-protein-trait

  • trait-protein-DNA-RNA

  • DNA-RNA-protein-trait

  • protein-DNA-RNA-trait

  • trait-RNA-protein-DNA

Explanation

Question 15 of 26

1

Which enzyme is responsible for joining strands of DNA during replication

Select one of the following:

  • DNA polymerase

  • DNA ligase

  • topoisomerase

  • primase

  • helicase

Explanation

Question 16 of 26

1

An insertion of a base pair in a coding region of a gene can result in a _____________ mutation where the reading of codons by the ribosome is altered

Select one of the following:

  • frameshift

  • wobble

  • base-pair substitution

  • thymine dimer

  • nondisjunction

Explanation

Question 17 of 26

1

Which component is found in DNA molecules but not in RNA molecules

Select one of the following:

  • ribose

  • thymine

  • nitrogen containing bases

  • phosphate group

  • guanine

Explanation

Question 18 of 26

1

All of the following occur during translation except

Select one of the following:

  • helicase opens the strand for copying

  • an initiator tRNA binds to a ribosomal subunit and the mRNA

  • the initiation complex forms when a large ribosomal subunit joins the initiator tRNA and the mRNA

Explanation

Question 19 of 26

1

All of the following are post-transcription modifications f eukaryotic mRNA except

Select one of the following:

  • introns are removed

  • exons may be spliced

  • peptide bonds are formed

Explanation

Question 20 of 26

1

prokaryotic DNA found outside the main chromosome is known as a

Select one of the following:

  • PCR

  • cDNA

  • primer

  • DNA chip

  • plasmid

Explanation

Question 21 of 26

1

Master genes that control the formation of specific body parts are

Select one of the following:

  • enhancers

  • promoters

  • exons

  • operons

  • homoeotic

Explanation

Question 22 of 26

1

PCR is used to

Select one of the following:

  • isolate mutations

  • sequence DNA

  • mass produce a certain DNA fragment

  • attach a tracer to a segment of DNA

  • cut DNA at specific nucleotide sequences

Explanation

Question 23 of 26

1

Series of 3 nucleotide bases on a tRNA molecule that binds with mRNA

Select one of the following:

  • anticodon

  • RNA Polymerase

  • rRNA

  • exon

  • operator

Explanation

Question 24 of 26

1

Enzyme responsible for pairing RNA bases with the DNA template

Select one of the following:

  • RNA Polymerase

  • anticodon

  • rRNA

  • exon

  • operator

Explanation

Question 25 of 26

1

In prokaryotic cells this is is the section of DNA that will bind a repressor in order to control gene population

Select one of the following:

  • operator

  • RNA Polymerase

  • anticodon

  • exon

Explanation

Question 26 of 26

1

The type of RNA found in ribosomes

Select one of the following:

  • rRNA

  • RNA Polymerase

  • operator

  • exon

  • anticodon

Explanation

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