TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preferred Cell: In the cell (C1), the heterologous polynucleotide encoding a polypeptide comprises an amino acid sequence at least 95% identical to any one of the amino acid sequences of (SEQ ID NO: 219) to (SEQ ID NO: 436), or (SEQ ID NO: 442) to (SEQ ID NO: 446). In the host cells, the heterologous polynucleotide is expressed. The cells further comprise a heterologous polynucleotide comprising a polynucleotide which encodes at least one cellobiohydrolase; heterologous polynucleotide comprising a polynucleotide which encodes beta -glucosidase; heterologous polynucleotide comprising a polynucleotide which encodes an endoglucanase; or heterologous polynucleotide comprising a polynucleotide which encodes a cellobiohydrolase, a heterologous polynucleotide comprising a polynucleotide which encodes a beta -glucosidase, and heterologous polynucleotide comprising a polynucleotide which encodes an endoglucanase. The host cell (C1)/(C2) is a xylose-utilizing host cell, where the xylose-utilizing host cell heterologously expresses xylose isomerase, overexpresses xylulokinase, ribulose 5-phosphate isomerase, ribulose 5-phophate epimerase, transketolase and transaldolase, and does not express the GRE3 gene encoding aldose reductase, the heterologously expressed xylose isomerase is encoded by a polynucleotide expressing a polypeptide comprising a xylose isomerase selected from (SEQ ID NO: 453) to (SEQ ID NO: 456), as available on WIPO website, and the cell overexpresses a xylulokinase encoded by a polynucleotide expressing a polypeptide comprising (SEQ ID NO: 457), as available on WIPO website, overexpresses a ribulose-phosphate 3-epimerase encoded by a polynucleotide expressing a polypeptide comprising (SEQ ID NO: 458), as available on WIPO website overexpresses a ribose 5-phosphate isomerase encoded by a polynucleotide expressing a polypeptide comprising (SEQ ID NO: 459), as available on WIPO website, overexpresses a transketolase encoded by a polynucleotide expressing a polypeptide comprising (SEQ ID NO: 460), as available on WIPO website, and overexpresses a transaldolase encoded by a polynucleotide expressing a polypeptide comprising (SEQ ID NO: 461), as available on WIPO website. The host cell further expresses an arabinose transporter encoded by a polynucleotide expressing a polypeptide comprising (SEQ ID NO: 462), as available on WIPO website, an arabinose isomerase encoded by a polynucleotide expressing a polypeptide comprising (SEQ ID NO: 463), as available on WIPO website, a ribulokinase encoded by a polynucleotide expressing a polypeptide comprising (SEQ ID NO: 464), as available on WIPO website and a ribulose-5-phosphate 4-epimerase encoded by a polynucleotide expressing a polypeptide comprising (SEQ ID NO: 465), as available on WIPO website. In the host cells, the heterologous polynucleotides express a polypeptide that is secreted. The host cells further comprise a heterologous polynucleotide containing nucleic acid which encodes a cellobiohydrolase, beta -glucosidase, and/or endoglucanase. In the host cells (C1)-(C4), the heterologous polynucleotides express a polypeptide that is secreted. In the host cell (C2), the heterologous polynucleotide is expressed. The host cell (C2) is an arabinose-utilizing host cell, where the arabinose-utilizing cell heterologously expresses arabinase, arabinoxylanase, arabinosidase, arabinose isomerase, arabinose transporter, and arabinofuranosidase. In the host cell (C1) or (C2), the heterologous polynucleotides express a polypeptide that is secreted. The host cell (C5) further comprises at least one heterologous polynucleotide comprising a nucleic acid which encodes an alpha-amylase, pullulanase, isopullulanse, or pectinase. The cells further comprise a heterologous polynucleotide comprising a nucleic acid which encodes a glucoamylase. The cells further comprise a heterologous polynucleotide comprising a nucleic acid which encodes an alpha-amylase, pullulanase, isopullulanase, alpha-glucosidase, arabinase, xylanase, glucoamylase, and pectinase. The cells further comprises at least one heterologous polynucleotide comprising at least one nucleic acid encoding at least one enzyme comprising a cellobiohydrolase, endo-glucanase, beta-glucosidase, xylanase, xylosidase, an alpha-amylase, a pullulanase, an isopullulanase, a pectinase, and an acetylxylan esterase. The cells further comprise polynucleotides encoding polypeptides comprising the amino acid sequence of (SEQ ID NO: 443), (SEQ ID NO: 287), (SEQ ID NO: 450), (SEQ ID NO: 451), and (SEQ ID NO: 452), as available on WIPO website. The host cells express polynucleotide encoding a polypeptide comprising the amino acid sequences of (SEQ ID NO: 466), (SEQ ID NO: 467), (SEQ ID NO: 245), and (SEQ ID NO: 278), as available on WIPO website; or express polynucleotide encoding a polypeptide comprising the amino acid sequences of (SEQ ID NO: 466), (SEQ ID NO: 467), (SEQ ID NO: 219), (SEQ ID NO: 220), and (SEQ ID NO: 468), as available on WIPO website. The cells further comprises: polynucleotide encoding polypeptides comprising the amino acid sequences of (SEQ ID NOs: 447-449); polynucleotide encoding polypeptides comprising the amino acid sequences of (SEQ ID NO: 453) to (SEQ ID NO: 461), as available on WIPO website; polynucleotide encoding polypeptides comprising the amino acid sequences of (SEQ ID NO: 462) to (SEQ ID NO: 465), as available on WIPO website; and polynucleotide encoding polypeptides comprising the amino acid sequences of (SEQ ID NO: 469) to (SEQ ID NO: 476), as available on WIPO website. The cell further comprises polynucleotides encoding at least one polypeptide comprising the amino acid sequence of (SEQ ID NO: 469) to (SEQ ID NO: 476), as available on WIPO website. The recombinant yeast cells comprise heterologous polynucleotide encoding at least three heterologous cellulases selected from cellulase triplets consisting of (Streptomyces avermitilis endo-1,4-beta-glucanase celA4 NP823744.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Streptomyces avermitilis endo-1,4-beta-glucanase celA2 NP823030.1); (Streptomyces avermitilis xylanase NP827548.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP 828072.1, and Streptomyces avermitilis endo-1,4-beta-glucanase celA2 NP823030.1); (Clostridium phytofermentans xylanase YP001557750.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP 828072.1, and Streptomyces avermitilis endo-1,4-beta-glucanase celA2 NP823030.1); (Saccharophagus degradans 2-40 mannanase YP525985.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Streptomyces avermitilis endo-1,4-beta-glucanase celA2 NP823030.1); (Streptomyces avermitilis endo-1,4-beta-glucanase celA3 NP823032.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Streptomyces avermitilis endo-1,4-beta-glucanase celA2 NP823030.1); (Bacillus subtilis endo-1,4-beta-glucanase eglS CAB13696.2, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Streptomyces avermitilis endo-1,4-beta-glucanase celA2 NP823030.1); (Streptomyces avermitilis endo-1,4-beta-glucanase NP 826394.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Streptomyces avermitilis endo-1,4-beta-glucanase celA2 NP823030.1); (Streptomyces avermitilis endo-1,4-beta-glucanase celA2 NP823030.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Streptomyces avermitilis endo-1,4-beta-glucanase celA4 NP823744.1); (Streptomyces avermitilis xylanase NP827 '548.1 Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Streptomyces avermitilis endo-1,4-beta-glucanase celA4 NP 823744.1); (Clostridium phytofermentans xylanase YP 001557750.1, Streptomyces avermitilis endo-1,4-beta-gIucanase celA5 NP 828072.1, and Streptomyces avermitilis endo-1,4-beta-glucanase celA4 NP823744.1); (Saccharophagus degradans 2-40 mannanase YP525985.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Streptomyces avermitilis endo-1,4-beta-glucanase celA4 NP823744.1); (Streptomyces avermitilis endo-1,4-beta-glucanase celA3 NP 823032.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Streptomyces avermitilis endo-1,4-beta-glucanase celA4 NP 823744.1); (Streptomyces avermitilis endo-1,4-beta-glucanase NP 826394.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Streptomyces avermitilis endo-1,4-beta-glucanase celA4 NP823744.1); (Bacillus subtilis endo-1,4-beta-glucanase eg1S CAB13696.2, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Streptomyces avermitilis endo-1,4-beta-glucanase celA4 NP 823744.1); (Streptomyces avermitilis endo-1,4-beta-glucanase celA2 NP823030.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1 , and Streptomyces avermitilis xylanase NP827548.1); (Streptomyces avermitilis endo-1,4-beta-glucanase celA4 NP823744 A, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Streptomyces avermitilis xylanase NP827548.1); (Clostridium phytofermentans xylanase YP001557750.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Streptomyces avermitilis xylanase NP827548.1); (Saccharophagus degradans 2-40 mannanase YP525985.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Streptomyces avermitilis xylanase NP827548.1); (Streptomyces avermitilis endo-1,4-beta-glucanase celA3 NP823032.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Streptomyces avermitilis xylanase NP827548.1); (Streptomyces avermitilis endo-1,4-beta-glucanase NP 826394.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP 828072.1, and Streptomyces avermitilis xylanase NP827548.1); (Bacillus subtilis endo-1,4-beta-glucanase eg1S CAB13696.2, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Streptomyces avermitilis xylanase NP827548.1); (Streptomyces avermitilis endo-1,4-beta-glucanase celA2 NP 823030.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Clostridium phytofermentans xylanase YP001557750.1); (Streptomyces avermitilis endo-1,4-beta-glucanase celA4 NP823744.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Clostridium phytofermentans xylanase YP001557750.1); (Streptomyces avermitilis xylanase NP 827548.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Clostridium phytofermentans xylanase YP OO 1557750.1); (Saccharophagus degradans 2-40 mannanase YP525985.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Clostridium phytofermentans xylanase YP001557750.1); (Streptomyces avermitilis endo-1,4-beta-glucanase celA3 NP823032.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Clostridium phytofermentans xylanase YP001557750.1); (Streptomyces avermitilis endo-1,4-beta-glucanase NP826394.1, (Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Clostridium phytofermentans xylanase YP001557750.1); and, (Bacillus subtilis endo-1,4-beta-glucanase eg1S CAB13696.2, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Clostridium phytofermentans xylanase YP001557750.1). The recombinant yeast cells comprise heterologous polynucleotide encoding at least four heterologous cellulases selected from cellulase quadruplets consisting of (Streptomyces avermitilis endo-1,4-beta-glucanase celA4 NP823744.1, Streptomyces avermitilis xylanase NP827548.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Streptomyces avermitilis endo-1,4-beta-glucanase celA2 NP823030.1); (Clostridium phytofermentans xylanase YP 001557750.1, Streptomyces avermitilis xylanase NP827548.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Streptomyces avermitilis endo-1,4-beta-glucanase celA2 NP823030.1); (Clostridium phytofermentans xylanase YP001557750.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA4 NP823744.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Streptomyces avermitilis endo-1,4-beta-glucanase celA2 NP823030.1); (Streptomyces avermitilis endo-1,4-beta-glucanase NP826394.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA4 NP823744.1, Streptomyces avermitilis endo-1,4-beta-glucanase cel A 5 NP828072.1, and Streptomyces avermitilis endo-1,4-beta-glucanase celA2 NP823030.1); (Saccharophagus degradans 2-40 mannanase YP 525985.1, Streptomyces avermitilis xylanase NP 827548.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828()72.1, and Streptomyces avermitilis endo-1,4-beta-glucanase celA2 NP823030.1); and (Saccharophagus degradans 2-40 mannanase YP525985.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA4, NP823744.1, Streptomyces avermitilis endo-1,4-beta-glucanase celA5 NP828072.1, and Streptomyces avermitilis endo-1,4-beta-glucanase celA2 NP823030J). The recombinant yeast cells comprise a heterologous polynucleotide encoding at least three heterologous amylolytic enzymes selected from amylolytic enzyme triplets consisting of: (SEQ ID NO: 442, SEQ ID NO: 445 and SEQ ID NO: 446); (SEQ ID NO: 444, SEQ ID NO: 445 and SEQ ID NO: 446); (SEQ ID NO: 442, SEQ ID NO: 445 and SEQ ID NO: 446). The recombinant yeast cell comprises a heterologous polynucleotide encoding at least four heterologous amylolytic enzymes selected from amylolytic enzyme quadruplets consisting of: (SEQ ID NO: 442, SEQ ID NO: 444, SEQ ID NO: 445 and SEQ ID NO: 446); (SEQ ID NO: 443, SEQ ID NO: 444, SEQ ID NO: 445 and SEQ ID NO: 446).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The carbon source comprises lignocellulosic material. EXAMPLE - No suitable example given.