The cell, nucleus & DNA

Question 1

what are prokaryotic cells?
( give examples)

Answer 1

prokaryotic cells, like bacteria, play important roles in living organisms. (examples: nutrition value and decomposition) Prokaryotic cells do not have nucleus and are simpler than eukaryotic cell. They have fewer internal structures

Question 2

what are Eukaryotic cells give examples

Answer 2

Eukaryotic cells have a nucleus, have organelles surrounded by membrane and larger and
more complex than prokaryotic cells
examples: animals, plants, fungi

Question 3

how many types of eukaryotic cells are there and what are they?

Answer 3

there are 2 and they are plant cells and animal cells

Question 4

what are some similarities and differences between animal cell and plant cell?

Answer 4

both animal and plant cells have nucleus which store genetic material. plant cells have a cell wall but animal cells don’t, plant cells have chloroplasts but animal cells don’t.

Question 5

what is the nucleus

Answer 5

the nucleus is the control centre of the cell , and controls all the cells activities inside the nucleus are attacks of DNA. some activity’s include cell growth, cell development, cell replication and cell death

Question 6

how many strands on chromatin contain DNA molecule and protein

Answer 6

only one, chromatic is also in the nucleus ( think of messy silly string)

Question 7

what shape will chromosome form when duplication to prepare for cell division

Answer 7

x shaped

Question 8

un duplicated chromosomes will look like?

Answer 8

a twig shape

Question 9

duplicated chromosomes look like

Answer 9

an x shaped

Question 10

what’s the circle in the centre of the chromosome called

Answer 10

centromere

Question 11

what’s a sister chromatid

Answer 11

two chromosomes

Question 12

how is dna packaged in the nucleus

Answer 12

dna turns into chromatin which is then folded into chromosomes and then in the nucleus of the cell

Question 13

what are sister chomatids

Answer 13

when chromosomes duplicate they are called sister chromatids

Question 14

How many chromosomes does a human have in each body cell?

Answer 14

Humans have 46 chromosomes in each body cell

Question 15

how many different types of chromosomes do humans have?

Answer 15

Humans have 23 different types of chromosomes

Question 16

There are two chromosomes in each different type. What are they from?

Answer 16

One is from a male sperm and one is from a female egg

Question 17

How many pairs of chromosomes are in each body cell?

Answer 17

23 pairs

Question 18

The 23rd pair determines the

Answer 18

sec of the human

Question 19

The female chromosome is?

Answer 19

x x

Question 20

The male chromosomes is

Answer 20

x y

Question 21

what are homologous chromosomes

Answer 21

the same type of chromosomes that have the same genes in the same order. within one type of homologous chromosome one is from a male sperm and the other is a female egg

Question 22

what are genes and where are they found?

Answer 22

genes are small segments of DNA found at specific places on a chromosome genes carry instructions to make specific proteins in the cells 

Question 23

homologous chromosomes contain the same type of genes but…

Answer 23

those genes may not be identical to one another

Question 24

what do genes make in the cell? 

Answer 24

specific protein, which is made at the ribosome