Triple Biology Test - DNA, enzymes, respiration, protein synthesis

Question 1 of 8

1

What are the correct base pairings in DNA?

Select one of the following:

A - C, G - T
C - G, A - T
T - C, G - A

Explanation

Question 2 of 8

1

Tick all that apply about DNA.

Select one or more of the following:

It is a polymer.
It has 6 different possible base pairing combinations.
It is made of nucleotides.
It has a triple helix structure.
DNA is inside the chromsomes which are in the gene.
DNA is inside the genes which are in the chromosomes.

Explanation

Question 3 of 8

1

Fill the blank spaces to complete the text.

Each base in forms links with their pairs on the other strand, keeping the strands wound together.

Complementary pairing also allows and helps synthesis.

Explanation

Question 4 of 8

1

Select from the dropdown lists to complete the text.

Protein synthesis takes place in the ( cytoplasm, nucleus, mitochondria ) and is aided by the ( lysosomes, ribosomes, mitochondria ).

The order of bases in a gene code for a different order of amino acids in a protein. Each amino acid is coded for by a sequence of ( two, three, four ) bases called a ( double, triplet, quadruplet ) code.

A ( shorter, longer ), single strand of DNA (called mRNA) goes through the unzipped DNA and matches each base with their ( opposite, complementary ) pair. This is called ( translation, transcription ).

The mRNA leaves the nucleus and enters the cytoplasm, where the ( ribosomes, mitochondra ) read the ( double, triplet, quadruplet ) codes and form the correct sequence of amino acids, joining them together to make a ( protein, ring ).

Explanation

Question 5 of 8

1

Enzymes are ❌ catalysts. They help to speed up reactions without ❌ themselves or getting 'used up'.

Enzymes are ❌ and are ❌ specific.

The ❌ and key method means the substrate can only enter the active site of the enzyme that has been built to break down that substrate.

Carbohydrase (example: ❌) break down carbohydrates into ❌ and simple sugars.
Protease (example: ❌) break down proteins into amino acids.
Lipase (example: ❌) break down ❌ and oils into fatty acids and ❌.

Select option below to complete the highlighted text

biological

environmental

pretty cool

damaging

exploding

proteins

single amino acids

very

not very

lock

door

amylase

starch

pepsin

lipids

fats

glycerol

sugar

Explanation

Question 6 of 8

1

Fill the blank spaces to complete the text.

Enzymes all have optimum pHs, temperatures and .

The optimum means the enzyme is working at its possible efficiency.
Too high or too low of a pH effects the between enzymes and substrates, slowing the rate of reaction.

If an enzyme concentration is increased, eventually the rate of reaction will remain the as all the have been broken down.

If the substrate concentration is increased, eventually the rate of reaction will remain the as all the active sites are .

Explanation

Question 7 of 8

1

Match the chemical with what they test for and how it is shown.

Ethanol tests for ❌. It has a ❌ if it is present and clear if it is not.
Iodine tests for ❌. It is ❌ when it is present and ❌ if it is not.
Benedict's solution tests for ❌. It is ❌ if it is present and ❌ if it is not.
Buiret solution tests for ❌. It is ❌ if it is present and blue if it is not.

Select option below to complete the highlighted text

fats

starch

creamy precipitate

black / purple

yellow

reducing sugars

red

blue

protein

pink

Explanation

Question 8 of 8

1

Fill the blank spaces to complete the text.

Respiration is the process of energy from the break down of sugar.
The energy transferred be used directly by the cells, so it is used to make .

respiration happens when there is plenty of oxygen available.

Glucose + oxygen -----> carbon dioxide + + energy

respiration produces less . Glucose is broken down to make acid (in animals) or , carbon dioxide and energy (in and fungi).

	Created by Shannon Bradner about 5 years ago

Year 9 Biology Quiz on Triple Biology Test - DNA, enzymes, respiration, protein synthesis, created by Shannon Bradner on 10/05/2019.

Triple Biology Test - DNA, enzymes, respiration, protein synthesis

Question 1 of 8

What are the correct base pairings in DNA?

Select one of the following:

Explanation

Question 2 of 8

Tick all that apply about DNA.

Select one or more of the following:

Explanation

Question 3 of 8

Fill the blank spaces to complete the text.

Each base in forms links with their pairs on the other strand, keeping the strands wound together. Complementary pairing also allows and helps synthesis.

Explanation

Question 4 of 8

Select from the dropdown lists to complete the text.

Explanation

Question 5 of 8

Select option below to complete the highlighted text

Explanation

Question 6 of 8

Fill the blank spaces to complete the text.

Explanation

Question 7 of 8

Select option below to complete the highlighted text

Explanation

Question 8 of 8

Fill the blank spaces to complete the text.

Explanation

Each base in forms links with their pairs on the other strand, keeping the strands wound together.

Complementary pairing also allows and helps synthesis.