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Biology > B5-Growth And Development > Flashcards

B5-Growth And Development Flashcards

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1
Q

Which bases always pair together?

A

A-T

C-G

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2
Q

What is a gene?

A

A gene is a section of DNA

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3
Q

What are proteins made of?

A

Amino acids

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4
Q

Why is the order of bases in a gene important for making a protein?

A

Because it’s the order of the bases in a gene that tells the cells how to make a protein

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5
Q

Where in the cell are proteins made?

A

Cytoplasm

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6
Q

Where in the cell is DNA found?

A

Nucleus

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7
Q

During cell growth does the number of chromosomes double or halve?

A

Halve

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8
Q

It’s purpose is to provide new cells for growth and repair

A

Mitosis

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9
Q

It’s purpose to creat gametes

A

Meiosis

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10
Q

The cells produced are genetically identical

A

Mitosis

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11
Q

The cells produced contain half the number of chromosomes that were in the parent cell

A

Meiosis

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12
Q

What is the name of the cell produced when two gametes combine?

A

Zygote

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13
Q

In an human embryo all the cells are unspecialised until what stage?

A

Eight cell stage

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14
Q

How are the stem cells in an embryo different from the stem cells in an adult?

A

Embryonic stem cells can turn into any type of cell whereas adult stem cells can’t

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15
Q

What determines the type of cell a stem cell becomes?

A

The genes that are active in the cell determine what type of cell a stem cell specialises into

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16
Q

What name is given to parts of plants where cells which divide by mitosis are found?

A

Meristems

17
Q

Name two types of tissue that the unspecialised cells in plants can turn into?

A

Xylem and phloem

18
Q

What is a cutting?

A

A cutting is a part of a plant that has been cut off

19
Q

What do cuttings grow into?

A

Identical plants to the cutting

20
Q

Why do people like gardeners take cuttings?

A

Desirable features

21
Q

What can be added to soil to encourage cuttings to grow roots?

A

Rooting powder

22
Q

What is phototropism?

A

Where plants grow towards or away from light

23
Q

Are shoots negatively or positively phototropic?

A

Shoots are positively phototropic

24
Q

How many different bases does DNA have?

A

Four different bases

Biology (3 decks)

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