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GCSE BIOLOGY > Biology > Flashcards

Biology Flashcards

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1
Q

How do you calculate total magnification

A

Eyepiece lens x Objective lens

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2
Q

What does resolution mean

A

Resolution is the ability to distinguish between two separate points in an image

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3
Q

What is the role of the nucleus

A

Contains DNA in the form of chromosomes. Contains the genetic code.

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4
Q

What is the role cytoplasm in a cell

A

This is where chemcial reactions take place

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5
Q

What is the function of the cell membrane

A

Controls what enters and leaves the cells.

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6
Q

What is function of the mitochondria is cells

A

This is the site of respiration.

Glucose + Oxyen –> Carbon dioxide + water vapour + ATP energy

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7
Q

Define the word ‘magnification’

A

Magnification is how much bigger an image is compared to it’s actual size.
Can be calculated by using the IAM triange.

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8
Q

Function of the cellulose cell wall

A

This is outer layer of plant cells. It is made of cellulose. It gives the plant strength and support.

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9
Q

Why are ribosomes needed in a cell?

A

Ribosomes are the site (location) where proteins are made.

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10
Q

What is the function of chloroplasts in plant cells?

A

Chloroplasts contain a green chemcial called chlorophyll. It traps sunlight energy which is needed for photosynthesis.

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11
Q

What is a Cell

A

The basic building block of life e.g. muscle cell

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12
Q

What is a Tissue

A

Formed by lots of similar CELLS working together to perform the same same function e.g. muscle tissue

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13
Q

What is an Organ

A

Formed by lots of TISSUES working together to form e.g. heart, brain, lungs

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14
Q

What is an Organ System

A

Lots of ORGANS working together in a SYSTEM e.g. digestive system, nervous system

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15
Q

What is an Organisms

A

Is all of the body’s SYSTEMS working together to form a living thing e.g. human, animal, tree

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16
Q

Stem cells

A

Before a cell has differentiated, or specialised it is called a stem cell.

A cell that has not yet become specialised.(undifferentiated)

Can replicate many times, and has the potential to become specialised (e.g. different type of cellj

17
Q

What is a Pathogen

A

a bacterium, virus, or other microorganism that can cause disease.

18
Q

What is HIV

A

human immunodeficiency virus, a retrovirus which causes AIDS.

19
Q

What is rose black spot

A

a fungal or bacterial disease of plants, especially roses, producing black blotches on the leaves.

20
Q

What is a vector

A

an organism, typically a biting insect or tick, that transmits a disease or parasite from one animal or plant to another.

21
Q

What is a communicable disease

A

an infectious disease transmissible from person to person by direct contact with an affected individual or the individual’s discharges or by indirect means by a vector CONTAGIOUS DESEASE

22
Q

What is a non communicable desease

A

A non-communicable disease is a medical condition or disease that is not caused by infectious agents non-infectious or non-transmissible can refer to chronic diseases which last for long periods of time and progress slowly. They are the leading cause of death globally.

23
Q

What is “LORD”

A 
L = left pumps
O = oxygenated 
R = right pumps 
D = de-oxygenated
24
Q

What is a carbohydrates

A

foods and living tissues and including sugars, starch, and cellulose.

25
Q

What is a Zygote

A

a diploid cell resulting from the fusion of two haploid gametes; a fertilized ovum.

26
Q

What is a artery

A

any of the muscular-walled tubes forming part of the circulation system by which blood is conveyed from the heart to all parts of the body.

27
Q

What is a vein

A

any of the tubes forming part of the blood circulation system of the body, carrying mainly oxygen-depleted blood towards the heart.

28
Q

What is cloning

A

propagate an organism or cell as a clone.

29
Q

What is a gene

A

A unit of heredity which is transferred from a parent to offspring and is held to determine some characteristic of the offspring.

30
Q

What is a bile

A

a bitter greenish-brown alkaline fluid which aids digestion and is secreted by the liver and stored in the gall bladder.

31
Q

What is a chromosome

A

a thread-like structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.

32
Q

What is a lipid

A

any of a class of organic compounds that are fatty acids or their derivatives and are insoluble in water but soluble in organic solvents. They include many natural oils, waxes, and steroids

33
Q

Higherarchy of living organisms

A

Cell -> tissues -> organs -> organ system -> organisms

GCSE BIOLOGY (6 decks)

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