iGCSE Biology Questions

Descripción

Test sobre iGCSE Biology Questions, creado por Pranali Amlani el 25/11/2014.
Pranali Amlani
Test por Pranali Amlani, actualizado hace más de 1 año
Pranali Amlani
Creado por Pranali Amlani hace alrededor de 10 años
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Resumen del Recurso

Pregunta 1

Pregunta
What does the nucleus do?
Respuesta
  • It controls all the activities of the cell and it contains genes on the chromosomes that carry the instructions for making the proteins needed to build new cells or new organisms.
  • The place wehere respiration is carried out.
  • Respiration occurs in the mitochondria, not the nucleus.

Pregunta 2

Pregunta
What do the plant cells contain that the animal cells do not?
Respuesta
  • Cell walls, chloroplasts and permanent vacuoles.
  • Ribosomes, chloroplasta and cells walls.

Pregunta 3

Pregunta
What is the definition of diffusion?
Respuesta
  • Diffusion is the net movement of particles from an area of high concentration to an area of low concentration, down the concentration gradient.
  • Diffusion is the net movement of particles from an area of low concentration to an area of high concentration, up the concentration gradient.

Pregunta 4

Pregunta
What is the formula for net movement?
Respuesta
  • paticles moving in-particles moving out
  • total particles-particles moving out

Pregunta 5

Pregunta
Red blood cells do not have a nucleus so that there is more space for haemoglobin to be stored. True or false?
Respuesta
  • True
  • False

Pregunta 6

Pregunta
A solution is made up of 2 parts. A solute and a solvent. A solvent dissolves in a solute.
Respuesta
  • True
  • False

Pregunta 7

Pregunta
What is the difference between a concentrated solvent and a dilute solvent?
Respuesta
  • A concentrated solvent has little solute dissolved in it and a dilute has a lot.
  • A concentrated solvent has a lot of solute dissolved in it and a dilute has only a little.

Pregunta 8

Pregunta
What is osmosis?
Respuesta
  • A special kind of diffusion invloving water molecules.
  • The name of the topic in which diffusion is a part of.
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