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Basics in Cytogenetics

Total questions: 20

Worksheet time: 20mins

Name
Class
Date
1.
Which of the following best describes a DNA molecule?
a)
double helix
b)
contains ribose
c)
made of amino acids
d)
contains Uracil
2.
Why is DNA important?
a)
it is very small and very complicated
b)
it's in everything
c)
it serves as the blueprint for traits of all living things
d)
because we eat it every day for energy
3.
Which organelle is DNA usually found in?
a)
cell membrane
b)
vacuole
c)
chloroplast
d)
nucleus
4.
What determines the code, or information, of a DNA molecule?
a)
the shape (structure) of the nitrogen bases
b)
the order (sequence) of the nitrogen bases
c)
the color of the nitrogen bases
d)
the frequency (number) of nitrogen bases
5.

What is a gene

a)

A long length of DNA that codes for a chromosome

b)

A short length of DNA that codes for a chromosome

c)

A short length of DNA that codes for a protein.

6.

The number of human chromosomes is

a)

23

b)

46

c)

92

d)

64

7.
A change in DNA or chromosomes
a)
Mitosis
b)
Meiosis
c)
mutation
d)
Osmosis
8.

Select all the components of the Central Dogma

a)

RNA

b)

Panda

c)

DNA

d)

Protein

9.

Where is DNA found in a human cell?

a)

ribosome

b)

nucleus

c)

cell membrane

d)

cytoplasm

10.

What is a long coiled strand of DNA and proteins?

a)

gene

b)

RNA

c)

chromosome

d)

genome

11.
The individual strands on duplicated chromosomes are called_____________
a)
Centromeres
b)
daughters
c)
Chromatids
d)
Karyotypes
12.
The ___________ holds the replicated sister chromatids together.
a)
centriole
b)
chromosomes
c)
centromere
d)
cycles
13.

About how many genes does the human genome contain?

a)

46

b)

1 billion

c)

200-300

d)

20,000-30,000

14.

A _________ is DNA tightly coiled around proteins.

a)

gene

b)

chromosome

c)

trait

d)

mutation

15.

Chromosomes that are paired by size and content are called _______ chromosomes.

a)

homeostasis

b)

homologous

c)

matching

d)

sister

16.

Cells that contain 2 sets of chromosomes are called _________ (2n).

a)

diploid

b)

haploid

c)

triploid

d)

polyploid

17.

Cells that contain only ONE set of chromosomes are called ________ (n).

a)

diploid

b)

polyploid

c)

triploid

d)

haploid

18.
Which of the following statements about homologous chromosomes is correct?
a)
Each gene is at the same locus on both chromosomes.
b)
They are two identical copies of a parent chromosome which are attached to one another at the centromere.
c)
They come from the same parent.
d)
They are chromosomes that have identical genes and alleles.
19.
A single piece of coiled DNA found in the cells; contains genes that encode traits.
a)
gene
b)
chromosome
c)
trait
d)
DNA
20.

How do you feel after this session?

a)
b)
c)

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