misconceptions of topic 3

Question 1

how are the sperms able to move (motility)

Answer 1

has flagellum that allows them to move. Sperms also have mitochondria which allows them to move faster as mitochondria releases energy

Question 2

how are ovum able to move (motility)

Answer 2

ovum can not move on their own. Ciliated cells allows the ovum to move

Question 3

cytoplasm

Answer 3

transports genetic material and cellular respiration

Question 4

acrosomes

Answer 4

releases enzyme

Question 5

cortical reaction

Answer 5

causes zona pellucida to harden, preventing other sperms (polysperm) to enter

Question 6

acrosomal reaction

Answer 6

the enzymes that is released by the acrosome digests the acrosome and allows the sperms head to enter

Question 7

fertillisation

Answer 7

occurs when a sperm cell and egg cell fuse their nuclei together.

Question 8

rough endoplasmic reticulum

Answer 8

folds and processes protein made on the ribosome

Question 9

smooth endoplasmic reticulum

Answer 9

produces and processes lipids

Question 10

golgi apparatus

Answer 10

modifies and packages proteins aswell lipids

Question 11

centromere

Answer 11

the region when the cells spindle fibres attach

Question 12

chromatid

Answer 12

when DNA replicates it forms chromosomes made of 2 identical sister

Question 13

homozygous

Answer 13

either both alleles are dominant or recessive

Question 14

hetrozygous

Answer 14

when one of the alleles is dominant and other is recessive

Question 15

spindle fibres

Answer 15

pulls the sister chromatid away from each other to opposite poles of the cell

Question 16

centrioles

Answer 16

pairs of hollow cylinders
made in spindle fibres

Question 17

cell membrane

Answer 17

control what enters and leaves

Question 18

cytoplasm

Answer 18

site of chemical reaction

Question 19

totipotent

Answer 19

have the ability to divide into any type of cell

Question 20

pluripotent

Answer 20

pluripotent cells can divide into any type of cells except extraembryonic cells

Question 21

multipotent

Answer 21

can only develop into a few different type of cell

Question 22

unipotent

Answer 22

the cells can only divide into only one type of cells

Question 23

embryonic stem cells

Answer 23

these are found in an early embryo, thees can develop into any type of cells

Question 24

adult stem cells

Answer 24

these are obtained from the body tissues of an adult. These stem cells aren’t as flexible as embryonic stem cells . They can only develop into a limited a range of cells

Question 25

advantage of adult stem cells

Answer 25

if a patient needs a stem cell transplants then their own adult stem cells can be used as there is less risk of rejection

Question 26

disadv of embryonic stem cells

Answer 26

raises ethical issues as the procedure results in destruction of an embryo