B3- Science. Cells, Genes and Enzymes.

MissChurro
Quiz by , created over 4 years ago

Quiz on the B3 GCSE biology. Covers topics of Cells, DNA, Protein Synthesis, Functions of Proteins, More on Enzymes, Mutations, Multiplying cells, Meiosis, Gametes and Fertilisation, Stem Cells, Differentiation and Growth, Growth and Respiration.

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MissChurro
Created by MissChurro over 4 years ago
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Question 1

Question
What is a Nucleus?
Answer
  • Gel-like substance where most of the cell's chemical reactions happen.
  • The part of the cell which contains DNA in the form of chromosomes
  • Where proteins are synthesised

Question 2

Question
A cell membrane is...
Answer
  • where most of the reactions involved in respiration take place.
  • what holds the cell together and controls what goes in and out.
  • a gel-like substance where most of the cell's chemical reactions happen.

Question 3

Question
What is a ribosome?
Answer
  • Where proteins are synthesised.
  • The part that holds the cell together and controls what goes in and out.
  • Where most of the reactions involved in respiration take place.

Question 4

Question
Cytoplasm is...
Answer
  • the part of the cell which contains DNA in the form of chromosomes.
  • a gel-like substance where most of the cell's chemical reactions happen.
  • a relatively large structure that contains cell sap, a weak solution of sugar and salts.

Question 5

Question
What is Mitochondria?
Answer
  • Where most of the reactions involved in respiration occur.
  • Where photosynthesis happens.
  • Another name for a bacterial cell.

Question 6

Question
Cells that need lots of energy contain many mitochondria. Which cells need lots if mitochondria?
Answer
  • Liver and Muscle cells.
  • Plant cells.
  • Every cell.

Question 7

Question
Instead of a nucleus, what do bacterial cells have?
Answer
  • Chloroplasts.
  • A single-circular strand of DNA.
  • Mitochondria.

Question 8

Question
What are Chromosomes?
Answer
  • Cell malfunctions.
  • Long molecules of coiled up DNA.
  • Enzymes.

Question 9

Question
DNA is a double helix (a double stranded spiral). Each of the two DNA strands are made up of what?
Answer
  • Proteins.
  • Cricks.
  • Nucleotides.

Question 10

Question
Nucleotides contain a small molecule called a "base". How many bases are there and what are they called?
Answer
  • 3-BOE
  • 5-TRLE
  • 4-ACGT

Question 11

Question
Each base forms cross links to a base on the other strand. This keeps the two DNA strands tightly wound together. But which base pairs, pair with each other?
Answer
  • A pairs with G, and T pairs with C.
  • A pairs with T and C pairs with G.
  • T pairs with G and A pairs with C.

Question 12

Question
Who were the first scientists ever to build a model of DNA?
Answer
  • Catson and Wrick.
  • Darwin and Lamarck.
  • Watson and Crick.

Question 13

Question
What data did Watson and Crick use from other scientists to form the model of DNA?
Answer
  • X-Rays showing double helix and data showing that bases occurred in pairs.
  • An X-ray of a skeleton.
  • Graphs showing DNA shrinking.

Question 14

Question
What does DNA do every time a cell divides?
Answer
  • Adds another strand.
  • Adds another "base" called O.
  • Copies itself so that each new cells still has the full amount of DNA.

Question 15

Question
What do new nucleotides do during this process?
Answer
  • Break up.
  • Join on using complementary base-pairing (ATCG). Making an exact copy.
  • Lose base pairs.

Question 16

Question
Which is correct?
Answer
  • |-TA-| |-AC-| |-GT-| |-GA-| |-AT-|
  • |-TA-| |-AT-| |-GC-| |-GC-| |-AT-|

Question 17

Question
What does DNA control the production of?
Answer
  • Proteins.
  • Oxygen.
  • Blood.

Question 18

Question
A section of DNA that codes for a particular proteins is called a...
Answer
  • Enzyme.
  • Nucleus.
  • Gene.

Question 19

Question
Proteins are made up of chains of molecules called what?
Answer
  • Cells.
  • Chloroplasts.
  • Amino Acids.

Question 20

Question
Each different protein has its own particular number and order of amino acids.
Answer
  • True
  • False

Question 21

Question
If each protein has its own particular number and order of amino acids, does this give the proteins a different shape or a different function?
Answer
  • Yes
  • No

Question 22

Question
How many bases is an amino acid coded by?
Answer
  • 4. (Quad)
  • 2. (Pair)
  • 3. (Triple)

Question 23

Question
The amino acids are joined together to make proteins, following how many bases there are in a gene.
Answer
  • True
  • False

Question 24

Question
So, why does each gene contain a different sequence of bases?
Answer
  • So it can produce more cells.
  • So it can code for a unique protein.

Question 25

Question
What carries the code to the Ribosomes?
Answer
  • DNA.
  • Proteins.
  • mRNA.

Question 26

Question
Where are the ribosomes?
Answer
  • The Nucleus.
  • The Cytoplasm.
  • The Mitochondria.

Question 27

Question
To make proteins, ribosomes use the code in the DNA. DNA is found in the cell nucleus an can't move out of it because...
Answer
  • DNA is really big.
  • The DNA will get lost.
  • DNA is really small.

Question 28

Question
If the DNA can't leave the cell then another molecule is needed to get the code from the DNA to the Ribosome. This is called mRNA. How is it used?
Answer
  • It takes the code from the DNA.
  • It produces more DNA.
  • It copies the code from the DNA.

Question 29

Question
DNA controls a cell by...
Answer
  • turning the cell on and off.
  • controlling protein production.
  • making more DNA.

Question 30

Question
Different types of cell have different functions because they make different proteins.
Answer
  • True
  • False

Question 31

Question
Why do some genes switched off?
Answer
  • So certain proteins are not produced.
  • So more proteins can be produced in different places.

Question 32

Question
In a muscle cell, which genes are switched on and which are switched off?
Answer
  • Bone, nerve and skin cells are switched on and muscle cells are off, to conserve energy.
  • Or are muscle cells switched on and bone, nerve and skin cells are switched off.

Question 33

Question
What is the function of a carrier molecule?
Answer
  • To carry messages around the body.
  • Strengthen connective tissues.
  • To transport smaller molecules.

Question 34

Question
What is the function of a hormone?
Answer
  • To produce proteins. e.g. muscle proteins.
  • To carry messages around the body. e.g. insulin.
  • To strengthen connective tissues.