IB Biology 1

The data is not correlated.

The data is widely spread around the mean.

The data shows a close relationship between two variables.

The data is clustered closely to the mean value.

Slower rate of exchange of waste materials

Faster heat loss

Faster rate of mitosis

Slower intake of food

They express some of their genes but not others.

They all have a different genetic composition.

Different cells contain a different set of chromosomes.

Different cells do not have some of the genes.

To produce ADP

To form the only protective layer preventing damage from outside

To control entry and exit of substances

To synthesize proteins

Homologous chromosomes pair

Synthesis of proteins

Homologous chromosomes separate

Replication of DNA

Formation of proteins

Formation of carbohydrates

Formation of teeth

Transmission of nerve impulses

When the temperature reaches 85 °C there are no more double-stranded DNA molecules.

When the temperature reaches 85 °C the DNA strands start separating rapidly.

A TM of 85 °C means that DNA is not stable at room temperature (25 °C).

The separation of the DNA strands is directly proportional to the increase in temperature.

Met-Pro-Arg-Ile-Thr

Met-Cys-Ser-Tyr-Trp

Met-Gly-Ala-Tyr-Trp

Met-Gly-Tyr-Ala-Thr

Storage of fat

Formation of mitochondria

Storage of energy

Formation of cell walls

To produce ATP and split water molecules

To produce ADP needed to fix carbon dioxide

To activate the enzymes that fix carbon dioxide

To activate carbon dioxide molecules

Tryptophan is replaced by leucine

Leucine is replaced by valine

Glutamic acid is replaced by valine

Lysine is replaced by glutamic acid.

DNA fragments

Genes

Chromosomes

Chromatids

Change of genetic code in the same species

Transfer of genes between species

Formation of clones

Infection by bacteria

Testing a suspected homozygote by crossing it with a known heterozygote

Testing a suspected heterozygote by crossing it with a known heterozygote

Testing a suspected homozygote by crossing it with a known homozygous dominant

Testing a suspected heterozygote by crossing it with a known homozygous recessive

Increased rates of decomposition of detritus trapped in permafrost

Decrease of geographical range of habitats for temperate species

Decrease of pest species and increase of permafrost species

Increase of geographical range of habitats for permafrost species

Population in the United States is increasing at a higher rate.

Infant death rate is high in both countries.

Males live longer than females in both countries.

Birth rate is higher in Mexico than in the United States.

Excess of food

Disease

Increase in prey

More space availability

Angiospermophyta

Bryophyta

Coniferophyta

Filicinophyta

Many pairs of legs

Flat body

Hard exoskeleton

Presence of cnidocytes

Villi

Lacteal

Cilia

Goblet cells

To initiate contraction of the ventricle

To pass the excitation through Purkinje fibres

To originate excitation in myogenic muscle

To cause the relaxation of the atria

They can produce specific antibodies.

They can engulf foreign matter

They can block specific metabolic pathways.

They can act as a vaccine.

I and II only

II only

II and III only

I, II and III

Colon

Pancreas

Small intestine

Liver

DNA and histone molecules

DNA only

RNA and histone molecules

Histone molecules only

DNA polymerase III adds nucleotides in the 3′→5′ direction.

DNA polymerase III adds nucleotides in the 5′→3′ direction.

DNA polymerase I adds nucleotides in the 5′→3′ direction.

RNA polymerase adds nucleotides in the 3′→5′ direction.

It causes a conformational change to the active site.

It binds to the enzyme away from the active site.

It is structurally similar to succinate.

It is structurally similar to succinate dehydrogenase

Pyruvate is carboxylated, acetyl reacts with coenzyme A, reducing NADH + H+

Pyruvate is decarboxylated, acetyl reacts with coenzyme A, forming NADH + H+

Pyruvate reacts with coenzyme A, forming NADH + H+

Pyruvate is decarboxylated, reacting with coenzyme A, reducing NADH + H+

Coupling of ATP synthesis to the electron transport and proton movement

Phosphorylation of glucose in the mitochondrial matrix

H + ions moving down a concentration gradient into the mitochondrial matrix

Activation of ATPase in order to synthesize ATP

Ribosome

Stroma

Inner membrane

Thylakoid

I and II only

I and III only

II and III only

I, II and III

Osmosis

Mass flow of water

Translocation

Through phloem

Abscisic acid

Gibberellin

Auxin

Ethylene

Sex-linked (X-linked)

Multiple alleles

Systemic

Polygenic

By having the disease

Injection of antibodies

Through colostrum

Via placenta

Tumour cells and T-cells

Tumour cells and B-cells

B-cells and T-cells

Antibodies and antigens

W

X

Y

Z

Selective reabsorption of water and molecules by active transport

Ultrafiltration introduces water and other molecules into the capillaries

Regulation of salt balance leading to the production of urine

High blood pressure forces water and other molecules into the nephron

Four eggs are produced                     Millions of sperms are per mitosis every 28 days                    produced per mitosis

Four eggs are produced                     One sperm is produced per per meiosis every 28 days                  meiosis

One egg is produced per                Millions of sperms are mitosis every 28 days                      produced per meiosis

One egg is produced per                 Four sperms are produced meiosis every 28 days                     per meiosis